src/vs/editor/contrib/unicodeHighlighter/browser/unicodeHighlighter.ts/DocumentUnicodeHighlighter/getDecorationInfo
class DocumentUnicodeHighlighter:	public getDecorationInfo(decoration: IModelDecoration): UnicodeHighlighterDecorationInfo | null {
		if (!this._decorations.has(decoration)) {
			return null;
		}
		const model = this._editor.getModel();
		if (
			!isModelDecorationVisible(model, decoration)
		) {
			return null;
		}
		const text = model.getValueInRange(decoration.range);
		return {
			reason: computeReason(text, this._options)!,
			inComment: isModelDecorationInComment(model, decoration),
			inString: isModelDecorationInString(model, decoration),
		};
	}