Need to check that the dtypes in HDF5 files created by the `sonata` module match the spec at https://github.com/AllenInstitute/sonata/blob/master/docs/SONATA_DEVELOPER_GUIDE.md#network_config
Need to check that the dtypes in HDF5 files created by the
sonatamodule match the spec at https://github.com/AllenInstitute/sonata/blob/master/docs/SONATA_DEVELOPER_GUIDE.md#network_config