src/vs/editor/common/model/textModel.ts/TextModel/_getDecorationsInRange
class TextModel:	private _getDecorationsInRange(filterRange: Range, filterOwnerId: number, filterOutValidation: boolean): model.IModelDecoration[] {
		const startOffset = this._buffer.getOffsetAt(filterRange.startLineNumber, filterRange.startColumn);
		const endOffset = this._buffer.getOffsetAt(filterRange.endLineNumber, filterRange.endColumn);
		return this._decorationsTree.getAllInInterval(this, startOffset, endOffset, filterOwnerId, filterOutValidation);
	}