pub unsafe extern "C" fn gst_harness_add_element_full(
    h: *mut GstHarness,
    element: *mut GstElement,
    hsrc: *mut GstStaticPadTemplate,
    element_sinkpad_name: *const c_char,
    hsink: *mut GstStaticPadTemplate,
    element_srcpad_name: *const c_char
)