src/vs/editor/browser/viewParts/lines/viewLine.ts/ViewLine/getColumnOfNodeOffset
class ViewLine:	public getColumnOfNodeOffset(lineNumber: number, spanNode: HTMLElement, offset: number): number {
		if (!this._renderedViewLine) {
			return 1;
		}
		return this._renderedViewLine.getColumnOfNodeOffset(lineNumber, spanNode, offset);
	}