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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def filterAcceptsRow(self, source_row, source_parent):
 """The filter method .. note:: This filter hides top-level items of unsupported branches and also leaf items containing xml files. Enabled root items: QgsDirectoryItem, QgsFavouritesItem, QgsPGRootItem. Disabled root items: QgsMssqlRootItem, QgsSLRootItem, QgsOWSRootItem, QgsWCSRootItem, QgsWFSRootItem, QgsWMSRootItem. Disabled leaf items: QgsLayerItem and QgsOgrLayerItem with path ending with '.xml' :param source_row: Parent widget of the model :type source_row: int :param source_parent: Parent item index :type source_parent: QModelIndex :returns: Item validation result :rtype: bool """

        source_index = self.sourceModel().index(source_row, 0, source_parent)
        item = self.sourceModel().dataItem(source_index)

        if item.metaObject().className() not in [
                'QgsPGRootItem',
                'QgsPGConnectionItem',
                'QgsPGSchemaItem',
                'QgsPGLayerItem',
                'QgsFavoritesItem',
                'QgsDirectoryItem',
                'QgsLayerItem',
                'QgsGdalLayerItem',
                'QgsOgrLayerItem']:
            return False

        if item.path().endswith('.xml'):
            return False

        return True