c_gst_tag_setter_add_tag_value

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
void function(GstTagSetter* setter, GstTagMergeMode mode, gchar* tag, GValue* value) c_gst_tag_setter_add_tag_value;

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