code: def GetByteSize(self):
      
      if not self.element_data_type_definition:
        return None
  
      if self.elements_data_size:
        return self.elements_data_size
  
      if not self.number_of_elements:
        return None
  
      element_byte_size = self.element_data_type_definition.GetByteSize()
      if not element_byte_size:
        return None
  
      return element_byte_size * self.number_of_elements
docs: Retrieves the byte size of the data type definition.
  
      Returns:
        int: data type size in bytes or None if size cannot be determined.