Look at parent datatypes when identifing a preferred visualization

        datatypes_conf.xml configuration file. These mappings determine which visualization plugin

        should be used by default when viewing datasets of a specific type.

        If no direct mapping exists for the extension, this method will walk up the inheritance

        chain to find a preferred visualization from a parent datatype class.

        Example configuration:

        <datatype extension="bam" type="galaxy.datatypes.binary:Bam" mimetype="application/octet-stream" display_in_upload="true">

            <visualization plugin="igv" />

        </datatype>

        """

        return self.visualization_mappings.get(datatype_extension)

        direct_mapping = self.visualization_mappings.get(datatype_extension)

        if direct_mapping:

            return direct_mapping

        current_datatype = self.get_datatype_by_extension(datatype_extension)

        if not current_datatype:

            return None

        # Use the same mapping approach as the datatypes API for consistency

        from galaxy.managers.datatypes import view_mapping

        mapping_data = view_mapping(self)

        current_class_name = mapping_data.ext_to_class_name.get(datatype_extension)

        if not current_class_name:

            return None

        current_class_mappings = mapping_data.class_to_classes.get(current_class_name, {})

        # Find parent extensions that have preferred visualizations

        for ext, visualization_mapping in self.visualization_mappings.items():

            if ext == datatype_extension:

                continue

            parent_class_name = mapping_data.ext_to_class_name.get(ext)

            if parent_class_name and parent_class_name in current_class_mappings:

                self.log.debug(

                    f"Found inherited preferred visualization '{visualization_mapping['visualization']}' for datatype '{datatype_extension}' from parent '{ext}'"

                )

                return visualization_mapping

        return None

    def get_all_visualization_mappings(self):

        """