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