Function groonga_sys::groonga::grn_pat_cursor_get_key_value

pub unsafe extern "C" fn grn_pat_cursor_get_key_value(
    ctx: *mut grn_ctx, 
    c: *mut grn_pat_cursor, 
    key: *mut *mut c_void, 
    key_size: *mut c_uint, 
    value: *mut *mut c_void
) -> c_int