pub unsafe extern "C" fn switch_channel_alloc(
channel: *mut *mut switch_channel_t,
direction: switch_call_direction_t,
pool: *mut switch_memory_pool_t,
) -> switch_status_tpub unsafe extern "C" fn switch_channel_alloc(
channel: *mut *mut switch_channel_t,
direction: switch_call_direction_t,
pool: *mut switch_memory_pool_t,
) -> switch_status_t