src/vs/editor/browser/config/editorConfiguration.ts/EditorConfiguration/_recomputeOptions
class EditorConfiguration:	private _recomputeOptions(): void {
		const newOptions = this._computeOptions();
		const changeEvent = EditorOptionsUtil.checkEquals(this.options, newOptions);
		if (changeEvent === null) {
			// nothing changed!
			return;
		}

		this.options = newOptions;
		this._onDidChangeFast.fire(changeEvent);
		this._onDidChange.fire(changeEvent);
	}