src/vs/editor/contrib/linesOperations/copyLinesCommand.ts/CopyLinesCommand/constructor
class CopyLinesCommand:	constructor(selection: Selection, isCopyingDown: boolean, noop?: boolean) {
		this._selection = selection;
		this._isCopyingDown = isCopyingDown;
		this._noop = noop || false;
		this._selectionDirection = SelectionDirection.LTR;
		this._selectionId = null;
		this._startLineNumberDelta = 0;
		this._endLineNumberDelta = 0;
	}