diff --git a/core/renderers/measurables/connection.js b/core/renderers/measurables/connection.js
index d7b8c8772..7d422a850 100644
--- a/core/renderers/measurables/connection.js
+++ b/core/renderers/measurables/connection.js
@@ -13,24 +13,25 @@
 goog.module('Blockly.blockRendering.Connection');
 goog.module.declareLegacyNamespace();
 
-goog.require('Blockly.blockRendering.Measurable');
-goog.require('Blockly.blockRendering.Types');
-goog.require('Blockly.utils.object');
-
-goog.requireType('Blockly.blockRendering.ConstantProvider');
-goog.requireType('Blockly.RenderedConnection');
+/* eslint-disable-next-line no-unused-vars */
+const ConstantProvider = goog.requireType('Blockly.blockRendering.ConstantProvider');
+const Measurable = goog.require('Blockly.blockRendering.Measurable');
+/* eslint-disable-next-line no-unused-vars */
+const RenderedConnection = goog.requireType('Blockly.RenderedConnection');
+const Types = goog.require('Blockly.blockRendering.Types');
+const object = goog.require('Blockly.utils.object');
 
 
 /**
  * The base class to represent a connection and the space that it takes up on
  * the block.
- * @param {!Blockly.blockRendering.ConstantProvider} constants The rendering
+ * @param {!ConstantProvider} constants The rendering
  *   constants provider.
- * @param {!Blockly.RenderedConnection} connectionModel The connection object on
+ * @param {!RenderedConnection} connectionModel The connection object on
  *     the block that this represents.
  * @package
  * @constructor
- * @extends {Blockly.blockRendering.Measurable}
+ * @extends {Measurable}
  */
 const Connection = function(constants, connectionModel) {
   Connection.superClass_.constructor.call(this,
@@ -38,9 +39,9 @@ const Connection = function(constants, connectionModel) {
   this.connectionModel = connectionModel;
   this.shape = this.constants_.shapeFor(connectionModel);
   this.isDynamicShape = !!this.shape['isDynamic'];
-  this.type |= Blockly.blockRendering.Types.CONNECTION;
+  this.type |= Types.CONNECTION;
 };
-Blockly.utils.object.inherits(Connection,
-    Blockly.blockRendering.Measurable);
+object.inherits(Connection,
+    Measurable);
 
 exports = Connection;
diff --git a/core/renderers/measurables/next_connection.js b/core/renderers/measurables/next_connection.js
index 7d5303923..bdffd8f46 100644
--- a/core/renderers/measurables/next_connection.js
+++ b/core/renderers/measurables/next_connection.js
@@ -13,33 +13,34 @@
 goog.module('Blockly.blockRendering.NextConnection');
 goog.module.declareLegacyNamespace();
 
-goog.require('Blockly.blockRendering.Connection');
-goog.require('Blockly.blockRendering.Types');
-goog.require('Blockly.utils.object');
-
-goog.requireType('Blockly.blockRendering.ConstantProvider');
-goog.requireType('Blockly.RenderedConnection');
+const Connection = goog.require('Blockly.blockRendering.Connection');
+/* eslint-disable-next-line no-unused-vars */
+const ConstantProvider = goog.requireType('Blockly.blockRendering.ConstantProvider');
+/* eslint-disable-next-line no-unused-vars */
+const RenderedConnection = goog.requireType('Blockly.RenderedConnection');
+const Types = goog.require('Blockly.blockRendering.Types');
+const object = goog.require('Blockly.utils.object');
 
 
 /**
  * An object containing information about the space a next connection takes
  * up during rendering.
- * @param {!Blockly.blockRendering.ConstantProvider} constants The rendering
+ * @param {!ConstantProvider} constants The rendering
  *   constants provider.
- * @param {Blockly.RenderedConnection} connectionModel The connection object on
+ * @param {RenderedConnection} connectionModel The connection object on
  *     the block that this represents.
  * @package
  * @constructor
- * @extends {Blockly.blockRendering.Connection}
+ * @extends {Connection}
  */
 const NextConnection = function(constants, connectionModel) {
   NextConnection.superClass_.constructor.call(this,
       constants, connectionModel);
-  this.type |= Blockly.blockRendering.Types.NEXT_CONNECTION;
+  this.type |= Types.NEXT_CONNECTION;
   this.height = this.shape.height;
   this.width = this.shape.width;
 };
-Blockly.utils.object.inherits(NextConnection,
-    Blockly.blockRendering.Connection);
+object.inherits(NextConnection,
+    Connection);
 
 exports = NextConnection;
diff --git a/core/renderers/measurables/output_connection.js b/core/renderers/measurables/output_connection.js
index c4941ae23..3f4a2d270 100644
--- a/core/renderers/measurables/output_connection.js
+++ b/core/renderers/measurables/output_connection.js
@@ -14,29 +14,30 @@
 goog.module('Blockly.blockRendering.OutputConnection');
 goog.module.declareLegacyNamespace();
 
-goog.require('Blockly.blockRendering.Connection');
-goog.require('Blockly.blockRendering.Types');
-goog.require('Blockly.utils.object');
-
-goog.requireType('Blockly.blockRendering.ConstantProvider');
-goog.requireType('Blockly.RenderedConnection');
+const Connection = goog.require('Blockly.blockRendering.Connection');
+/* eslint-disable-next-line no-unused-vars */
+const ConstantProvider = goog.requireType('Blockly.blockRendering.ConstantProvider');
+/* eslint-disable-next-line no-unused-vars */
+const RenderedConnection = goog.requireType('Blockly.RenderedConnection');
+const Types = goog.require('Blockly.blockRendering.Types');
+const object = goog.require('Blockly.utils.object');
 
 
 /**
  * An object containing information about the space an output connection takes
  * up during rendering.
- * @param {!Blockly.blockRendering.ConstantProvider} constants The rendering
+ * @param {!ConstantProvider} constants The rendering
  *   constants provider.
- * @param {Blockly.RenderedConnection} connectionModel The connection object on
+ * @param {RenderedConnection} connectionModel The connection object on
  *     the block that this represents.
  * @package
  * @constructor
- * @extends {Blockly.blockRendering.Connection}
+ * @extends {Connection}
  */
 const OutputConnection = function(constants, connectionModel) {
   OutputConnection.superClass_.constructor.call(this,
       constants, connectionModel);
-  this.type |= Blockly.blockRendering.Types.OUTPUT_CONNECTION;
+  this.type |= Types.OUTPUT_CONNECTION;
 
   this.height = !this.isDynamicShape ? this.shape.height : 0;
   this.width = !this.isDynamicShape ? this.shape.width : 0;
@@ -45,7 +46,7 @@ const OutputConnection = function(constants, connectionModel) {
   this.connectionOffsetY = this.constants_.TAB_OFFSET_FROM_TOP;
   this.connectionOffsetX = 0;
 };
-Blockly.utils.object.inherits(OutputConnection,
-    Blockly.blockRendering.Connection);
+object.inherits(OutputConnection,
+    Connection);
 
 exports = OutputConnection;
diff --git a/core/renderers/measurables/previous_connection.js b/core/renderers/measurables/previous_connection.js
index ebbadf49c..d9a6eaddc 100644
--- a/core/renderers/measurables/previous_connection.js
+++ b/core/renderers/measurables/previous_connection.js
@@ -13,35 +13,36 @@
 goog.module('Blockly.blockRendering.PreviousConnection');
 goog.module.declareLegacyNamespace();
 
-goog.require('Blockly.blockRendering.Connection');
-goog.require('Blockly.blockRendering.Types');
-goog.require('Blockly.utils.object');
-
-goog.requireType('Blockly.blockRendering.ConstantProvider');
-goog.requireType('Blockly.RenderedConnection');
+const Connection = goog.require('Blockly.blockRendering.Connection');
+/* eslint-disable-next-line no-unused-vars */
+const ConstantProvider = goog.requireType('Blockly.blockRendering.ConstantProvider');
+/* eslint-disable-next-line no-unused-vars */
+const RenderedConnection = goog.requireType('Blockly.RenderedConnection');
+const Types = goog.require('Blockly.blockRendering.Types');
+const object = goog.require('Blockly.utils.object');
 
 
 /**
  * An object containing information about the space a previous connection takes
  * up during rendering.
- * @param {!Blockly.blockRendering.ConstantProvider} constants The rendering
+ * @param {!ConstantProvider} constants The rendering
  *   constants provider.
- * @param {Blockly.RenderedConnection} connectionModel The connection object on
+ * @param {RenderedConnection} connectionModel The connection object on
  *     the block that this represents.
  * @package
  * @constructor
- * @extends {Blockly.blockRendering.Connection}
+ * @extends {Connection}
  */
 const PreviousConnection = function(
     constants, connectionModel) {
   PreviousConnection.superClass_.constructor.call(this,
       constants, connectionModel);
-  this.type |= Blockly.blockRendering.Types.PREVIOUS_CONNECTION;
+  this.type |= Types.PREVIOUS_CONNECTION;
   this.height = this.shape.height;
   this.width = this.shape.width;
 
 };
-Blockly.utils.object.inherits(PreviousConnection,
-    Blockly.blockRendering.Connection);
+object.inherits(PreviousConnection,
+    Connection);
 
 exports = PreviousConnection;