src/vs/workbench/browser/parts/editor/editorPart.ts/EditorPart/handleChangedPartOptions
class EditorPart:	private handleChangedPartOptions(): void {
		const oldPartOptions = this._partOptions;
		const newPartOptions = getEditorPartOptions(this.configurationService, this.themeService);

		this.enforcedPartOptions.forEach(enforcedPartOptions => {
			Object.assign(newPartOptions, enforcedPartOptions); // check for overrides
		});

		this._partOptions = newPartOptions;

		this._onDidChangeEditorPartOptions.fire({ oldPartOptions, newPartOptions });
	}