FBX SDK uses an SDK manager (Class KFbxSdkManager) that is responsible for allocating and deallocating memory whenever any scene element (i.e., a node in the scene graph) is created or destroyed.
Deleting the SDK manager causes any remaining objects to be destroyed.
The header is:
include/fbxfilessdk/kfbxplugins/kfbxsdkmanager.h
