<SUBSECTION element-messages>
gst_element_message_full
+gst_element_message_full_with_details
+gst_element_message_details_new
gst_element_post_message
<SUBSECTION element-query>
gst_message_new_eos
gst_message_new_error
+gst_message_new_error_with_details
gst_message_parse_error
+gst_message_parse_error_details
gst_message_new_warning
+gst_message_new_warning_with_details
gst_message_parse_warning
+gst_message_parse_warning_details
gst_message_new_info
+gst_message_new_info_with_details
gst_message_parse_info
+gst_message_parse_info_details
gst_message_new_tag
gst_message_parse_tag
gst_message_new_buffering