extensions/references-view/src/utils.ts/WordAnchor/_getAnchorWord
class WordAnchor:	private _getAnchorWord(doc: vscode.TextDocument, pos: vscode.Position): string | undefined {
		const range = doc.getWordRangeAtPosition(pos) || doc.getWordRangeAtPosition(pos, /[^\s]+/);
		return range && doc.getText(range);
	}