code: def __str__(self):
      dimension_str = ""
      if self._dimension is not None:
          dimension_str += "["
          for dim in self._dimension:
              dimension_str += str(dim) + ", "
          dimension_str = dimension_str.rstrip(", ")
          dimension_str += "]"
  
      if self.array_type is None:
          return "{} {}".format(self._name, self._type)
      else:
          return "{} {} {} {}".format(
              self._name, self._type, self.array_type, dimension_str
          )
  
imports: from dataclasses import dataclass
  from typing import List, Optional, Tuple
  from evadb.catalog.catalog_type import ColumnType, NdArrayType
  from evadb.parser.select_statement import SelectStatement
  from evadb.parser.statement import AbstractStatement
  from evadb.parser.table_ref import TableInfo
  from evadb.parser.types import StatementType
label_desc: Use image node_id 8 for calling the ColumnDefinition obj's underlying member method code with example usage: obj.__str__() and returns: str, str