src/vs/editor/common/core/selection.ts/Selection/setStartPosition
class Selection:	public override setStartPosition(startLineNumber: number, startColumn: number): Selection {
		if (this.getDirection() === SelectionDirection.LTR) {
			return new Selection(startLineNumber, startColumn, this.endLineNumber, this.endColumn);
		}
		return new Selection(this.endLineNumber, this.endColumn, startLineNumber, startColumn);
	}