Function nm_keyfile_read 

pub unsafe extern "C" fn nm_keyfile_read(
    keyfile: *mut GKeyFile,
    base_dir: *const c_char,
    handler_flags: NMKeyfileHandlerFlags,
    handler: NMKeyfileReadHandler,
    user_data: *mut c_void,
    error: *mut *mut GError,
) -> *mut NMConnection

Available on crate feature v1_30 only.