* Migrate core/widgetdiv.js to ES6 const/let
* Migrate core/widgetdiv.js to goog.module
* Migrate core/widgetdiv.js to named requires
* clang-format core/widgetdiv.js
* Mark WidgetDiv.DIV as deprecated and refactor callers to use setters/getters
* Fix deprecation date
* Refactor tests to make setDiv() in core/widgetdiv.js test-only
* Fix type annotations for WidgetDiv.DIV and move test cleanup into sharedTestTeardown
* Migrate core/variables.js to ES6 const/let
* Migrate core/variables.js to goog.module
* Migrate core/variables.js to named requires
* clang-format core/variables.js
* Add JSDoc and make testdeps function test-only
* Fix return type for getTestDeps
* Migrate to new style of exposing methods for mocking in core/variables.js
* Fix error conditions for setParent #4989
* Error now thrown when calling `a.setParent(b)` on non-null b if the output/previous connection of a is not connected to an input/next connection of b without removing block from old parent's child list.
* Commented out error for when calling `a.setParent(null)` if a is connected to superior block.
* Adjusted comment to reflect that blocks were no longer being disconnected in this method.
* Also changed == to === per #4924 (`newParent` and `this.parentBlock_` must both be instances of `Blockly.Block`).
* Fix error conditions for setParent #4989
* Error now thrown when calling `a.setParent(b)` on non-null b if the output/previous connection of a is not connected to an input/next connection of b without removing block from old parent's child list.
* Error now thrown when calling `a.setParent(null)` if a is connected to a superior block.
* Adjusted comment to reflect that blocks were no longer being disconnected in this method.
* Also changed == to === per #4924 (`newParent` and `this.parentBlock_` must both be instances of `Blockly.Block`).
* Fix error conditions for setParent #4989
* Error now thrown when calling `a.setParent(b)` on non-null b if the output/previous connection of a is not connected to an input/next connection of b without removing block from old parent's child list.
* Commented out error for when calling `a.setParent(null)` if a is connected to superior block.
* Adjusted comment to reflect that blocks were no longer being disconnected in this method.
* Also changed == to === per google#4924 (`newParent` and `this.parentBlock_` must both be instances of `Blockly.Block`).
* Fixed lint errors.
* Fix error conditions for setParent google#4989
* Error now thrown when calling `a.setParent(b)` on non-null b if the output/previous connection of a is not connected to an input/next connection of b without removing block from old parent's child list.
* Commented out error for when calling `a.setParent(null)` if a is connected to superior block.
* Adjusted comment to reflect that blocks were no longer being disconnected in this method.
* Also changed == to === per google#4924 (`newParent` and `this.parentBlock_` must both be instances of `Blockly.Block`).
* Fixed lint errors.
* Adjusted comment.
* Removed unnecessary set to null/added tests
* One is failing (commented out), will investigate later
* Lint fix
* Removed failing test that correctly fails
* Update comments to conform to style guide
Capitalize first letter, period at end
These functions have side effects and set all kinds of private fields. It is misleading for them to return the top-level element, for the caller to assign to a private field.
* Now throws error for getField/getFieldValue/setFieldValue if provided name is not a string
* Changed error to more specific TypeError
* Type checking and error message moved up to getField
* Tests added/modified to check that non-string types for field names produce type errors
* Added tests for getting/setting field (values) when names are not supplied and test for getting a field value, setting it to a new value, and getting it again.
* Added more user-friendly error message for setFieldValue telling the developer that he/she is missing the name rather than Field "undefined" not found.
