feat: make isMutator public (#6316)

* feat: make isMutator public

* fix: move isFlyout and isMutator to getters

* chore: delete change detector test

core/flyout_base.ts

@@ -255,7 +255,7 @@ export abstract class Flyout extends DeleteArea implements IFlyout {
     this.workspace_.setMetricsManager(
         new FlyoutMetricsManager(this.workspace_, this));
 
-    this.workspace_.isFlyout = true;
+    this.workspace_.internalIsFlyout = true;
     // Keep the workspace visibility consistent with the flyout's visibility.
     this.workspace_.setVisible(this.isVisible_);
 

core/mutator.ts

@@ -191,7 +191,7 @@ export class Mutator extends Icon {
       workspaceOptions.languageTree = toolbox.convertToolboxDefToJson(quarkXml);
     }
     this.workspace_ = this.newWorkspaceSvg(workspaceOptions);
-    this.workspace_.isMutator = true;
+    this.workspace_.internalIsMutator = true;
     this.workspace_.addChangeListener(eventUtils.disableOrphans);
 
     // Mutator flyouts go inside the mutator workspace's <g> rather than in

core/workspace.ts

@@ -61,14 +61,27 @@ export class Workspace implements IASTNodeLocation {
    */
   rendered = false;
 
+  /**
+   * Is this workspace the surface for a flyout?
+   * @internal
+   */
+  internalIsFlyout = false;
+
   /** Is this workspace the surface for a flyout? */
-  isFlyout = false;
+  get isFlyout(): boolean {
+    return this.internalIsFlyout;
+  }
 
   /**
    * Is this workspace the surface for a mutator?
    * @internal
    */
-  isMutator = false;
+  internalIsMutator = false;
+
+  /** Is this workspace the surface for a mutator? */
+  get isMutator(): boolean {
+    return this.internalIsMutator;
+  }
 
   /**
    * Returns `true` if the workspace is currently in the process of a bulk