docs: def WriteArtifact(self, artifact, cursor=None):
      """Writes new artifact to the database."""
      name = Text(artifact.name)
  
      try:
        cursor.execute("INSERT INTO artifacts (name, definition) VALUES (%s, %s)",
                       [name, artifact.SerializeToString()])
      except MySQLdb.IntegrityError as error:
        if error.args[0] == mysql_error_constants.DUP_ENTRY:
          raise db.DuplicatedArtifactError(name, cause=error)
        else:
          raise