static void FillCompactPoseMirrorBones ( const [FBoneContainer](API\Runtime\Engine\FBoneContainer) & BoneContainer, const TCustomBoneIndexArray< [FSkeletonPoseBoneIndex](API\Runtime\AnimationCore\FSkeletonPoseBoneIndex), [FSkeletonPoseBoneIndex](API\Runtime\AnimationCore\FSkeletonPoseBoneIndex) > & MirrorBoneIndexes, TCustomBoneIndexArray< [FCompactPoseBoneIndex](API\Runtime\AnimationCore\FCompactPoseBoneIndex), [FCompactPoseBoneIndex](API\Runtime\AnimationCore\FCompactPoseBoneIndex) > & OutCompactPoseMirrorBones )