src/vs/editor/contrib/wordHighlighter/browser/wordHighlighter.ts/OccurenceAtPositionRequest/_getCurrentWordRange
class OccurenceAtPositionRequest:	private _getCurrentWordRange(model: ITextModel, selection: Selection): Range | null {
		const word = model.getWordAtPosition(selection.getPosition());
		if (word) {
			return new Range(selection.startLineNumber, word.startColumn, selection.startLineNumber, word.endColumn);
		}
		return null;
	}