pub unsafe extern "C" fn switch_channel_pass_sdp(
from_channel: *mut switch_channel_t,
to_channel: *mut switch_channel_t,
sdp: *const c_char,
) -> switch_status_tpub unsafe extern "C" fn switch_channel_pass_sdp(
from_channel: *mut switch_channel_t,
to_channel: *mut switch_channel_t,
sdp: *const c_char,
) -> switch_status_t