def free_pinned(ptr):
    cptr = ct.c_void_p(ptr)
    safe_call(backend.get().af_free_pinned(cptr))
Get all the primary keys for an array of models.
dataset/ETHPy150Open arrayfire/arrayfire-python/arrayfire/device.py/free_pinned--crossover with--dataset/ETHPy150Open sdispater/orator/orator/orm/relations/relation.py/Relation.get_keys