How use vector/transformation animation curves?

Hi. In custom animationModifier class blueprint i gonna produceraly add bones transform curves for every animation sequences. In function “add Curve” i found curve type selection enum, that contains float, vector, and transformation curve. Of course using transfromation curves would be a best variant because this reduce curves count by 6 times (contains location xyz; and rotation xyz). But i cant find any function in animation blueprint for get transform curve value from animation curve, animBP has only standart “get curve value” for single float animation curve.
Question: working with vector/transform animCurves not yet implemented in ue4 blueprints and need create custom C++ functions from API?