src/vs/editor/browser/widget/diffEditorWidget.ts/DiffEditorWidget/getDiffLineInformationForOriginal
class DiffEditorWidget:	public getDiffLineInformationForOriginal(lineNumber: number): editorBrowser.IDiffLineInformation | null {
		if (!this._diffComputationResult) {
			// Cannot answer that which I don't know
			return null;
		}
		return {
			equivalentLineNumber: this._getEquivalentLineForOriginalLineNumber(lineNumber)
		};
	}