public string missing_element_installer_detail_new (string factory_name)
This function is mainly for applications that call external plugin installation mechanisms using one of the two above-mentioned functions in the case where the application knows exactly what kind of plugin it is missing.
the name of the missing element (element factory), e.g. "videoscale" or "cdparanoiasrc"
a newly-allocated detail string, or NULL on error. Free string with g_free when not needed any longer.