src/vs/editor/common/model/textModel.ts/TextModel/_getInjectedTextInLine
class TextModel:	private _getInjectedTextInLine(lineNumber: number): LineInjectedText[] {
		const startOffset = this._buffer.getOffsetAt(lineNumber, 1);
		const endOffset = startOffset + this._buffer.getLineLength(lineNumber);

		const result = this._decorationsTree.getInjectedTextInInterval(this, startOffset, endOffset, 0);
		return LineInjectedText.fromDecorations(result).filter(t => t.lineNumber === lineNumber);
	}