src/vs/editor/contrib/gotoSymbol/browser/link/goToDefinitionAtPosition.ts/GotoDefinitionAtPositionEditorContribution/stripIndentationFromPreviewRange
class GotoDefinitionAtPositionEditorContribution:	private stripIndentationFromPreviewRange(textEditorModel: ITextModel, startLineNumber: number, previewRange: IRange) {
		const startIndent = textEditorModel.getLineFirstNonWhitespaceColumn(startLineNumber);
		let minIndent = startIndent;

		for (let endLineNumber = startLineNumber + 1; endLineNumber < previewRange.endLineNumber; endLineNumber++) {
			const endIndent = textEditorModel.getLineFirstNonWhitespaceColumn(endLineNumber);
			minIndent = Math.min(minIndent, endIndent);
		}

		const previewValue = textEditorModel.getValueInRange(previewRange).replace(new RegExp(`^\\s{${minIndent - 1}}`, 'gm'), '').trim();
		return previewValue;
	}