src/vs/editor/browser/coreCommands.ts/EditorScrollImpl/runCoreEditorCommand
class EditorScrollImpl:		public runCoreEditorCommand(viewModel: IViewModel, args: any): void {
			const parsed = EditorScroll_.parse(args);
			if (!parsed) {
				// illegal arguments
				return;
			}
			this._runEditorScroll(viewModel, args.source, parsed);
		}