grpc_session_attr_get_np - Gets handle attributes.
grpc_error_t grpc_session_attr_get_np(grpc_session_attr_t_np *attr,
grpc_session_attr_name_t_np name,
void **value)
grpc_session_attr_t_np *attr grpc_session_attr_name_t_np name void *valueMemory area allocated for the attribute value should be released by calling grpc_session_attr_release_np() after the value was referred.
This function is MT-safe.
GRPC_NOT_INITIALIZED GRPC_OTHER_ERROR_CODE