Function gst_ validate_ element_ has_ klass 
Source pub unsafe extern "C" fn gst_validate_element_has_klass(
    element: *mut GstElement,
    klass: *const c_char,
) -> gbooleanpub unsafe extern "C" fn gst_validate_element_has_klass(
    element: *mut GstElement,
    klass: *const c_char,
) -> gboolean