I am trying to use the Plasma store to back xnd objects. Xnd (
https://xnd.readthedocs.io/en/latest/xnd/index.html) is a container library
in C that has Python bindings. I would like to get a pointer to the
allocated memory after creating or get an object in Plasma. I see that this
is supported in the C++ API (
https://arrow.apache.org/docs/cpp/classplasma_1_1_plasma_client.html#ac18ab9cc792c620a97a3dcb165e0ecd7)
but not in the python API (as far as I can tell). Is it possible to use the
C++ Plasma API from a C project? If not, would it make sense to expose
pointer access on the Python API using capsules
https://docs.python.org/3.6/c-api/capsule.html
<https://docs.python.org/3.6/c-api/capsule.html#capsules>?
