'Converts an xml fragment into a dictionary. The parent xml element
contains a list of xml elements where each element has a child element for
the key, and another for the value.
Example:
xmldoc=
<ExtendedProperties>
<ExtendedProperty>
<Name>Ext1</Name>
<Value>Val1</Value>
</ExtendedProperty>
<ExtendedProperty>
<Name>Ext2</Name>
<Value>Val2</Value>
</ExtendedProperty>
</ExtendedProperties>
element_type=str
parent_xml_element_name=\'ExtendedProperties\'
pair_xml_element_name=\'ExtendedProperty\'
key_xml_element_name=\'Name\'
value_xml_element_name=\'Value\''

@staticmethod
def _fill_dict_of(xmldoc, parent_xml_element_name, pair_xml_element_name, key_xml_element_name, value_xml_element_name):

    raise NotImplementedError('_dict_of    not    supported')
