static [FRigElementKeyCollection](API\Plugins\ControlRig\Rigs\FRigElementKeyCollection) MakeFromChildren ( [URigHierarchy](API\Plugins\ControlRig\Rigs\URigHierarchy) * InHierarchy, const [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) & InParentKey, bool bRecursive, bool bIncludeParent, uint8 InElementTypes )