code: def unpack_char16(self, data):
          
  
          if data is None:
              return None
  
          len_data = len(data)
  
          if len_data == 0:
              raise CIMXMLParseError(
                  "Char16 value is empty",
                  conn_id=self.conn_id)
  
          if len_data > 1:
              # More than one character, or one character from the UCS-4 set
              # in a narrow Python build (which represents it using
              # surrogates).
              raise CIMXMLParseError(
                  _format("Char16 value has more than one UCS-2 "
                          "character: {0!A}", data),
                  conn_id=self.conn_id)
  
          if ord(data) > 0xFFFF:
              # One character from the UCS-4 set in a wide Python build.
              raise CIMXMLParseError(
                  _format("Char16 value is a character outside of the "
                          "UCS-2 range: {0!A}", data),
                  conn_id=self.conn_id)
  
          return data
docs: Unpack a CIM-XML string value of CIM type 'char16' and return it
          as a unicode string object, or None.
  
          data (unicode string): CIM-XML string value, or None (in which case
            None is returned).