code: def validate(self):
          
          # Check all values for None
          for attr in self.__dict__:
              if self.__dict__[attr] is None:
                  raise ValueError(attr + " is not set")
  
          # Validate name
          invalid_chars = GPTaskSpec.invalid_chars()
          if any(char in invalid_chars for char in self.name):
              raise ValueError("module name includes invalid characters: " + self.name)
  
          # Validate LSID
          self._valid_lsid()
  
          # Validate categories
          if not self.all_strings(self.categories):
              raise TypeError("categories contains non-string value: " + str(self.categories))
  
          # Validate file formats
          if not self.all_strings(self.file_format):
              raise TypeError("file_format contains non-string value: " + str(self.file_format))
  
          # Validate support files
          if not self.all_strings(self.support_files):
              raise TypeError("support_files contains non-string value: " + str(self.support_files))
  
          # Validate parameter list
          if not self._all_params(self.parameters):
              raise TypeError("parameters contains non-GPParamSpec value: " + str(self.parameters))
  
          # Validate individual parameters
          for param in self.parameters:
              param.validate()
  
          # Return that everything validates
          return True
docs: Perform some basic checks to help ensure that the specification is valid.
          Throws an exception if an invalid value is found.
          Returns true if all checks were passed.
          :return: boolean