src/vs/editor/browser/view/viewController.ts/ViewController/_columnSelect
class ViewController:	private _columnSelect(viewPosition: Position, mouseColumn: number, doColumnSelect: boolean): void {
		viewPosition = this._validateViewColumn(viewPosition);
		CoreNavigationCommands.ColumnSelect.runCoreEditorCommand(this.viewModel, {
			source: 'mouse',
			position: this._convertViewToModelPosition(viewPosition),
			viewPosition: viewPosition,
			mouseColumn: mouseColumn,
			doColumnSelect: doColumnSelect
		});
	}