#[no_mangle]
pub unsafe extern "C" fn dc_add_contact_to_chat(
context: *mut dc_context_t,
chat_id: u32,
contact_id: u32,
) -> c_int
#[no_mangle]
pub unsafe extern "C" fn dc_add_contact_to_chat(
context: *mut dc_context_t,
chat_id: u32,
contact_id: u32,
) -> c_int