code: def column_by_name(self, name: str) -> Optional[FileColumnMetadata]:
      for c in self.columns:
          if c.name == name:
              return c
  
imports: from enum import Enum
  from typing import Dict, List, Optional, Set
  from pydantic import BaseModel
label_desc: Use image node_id 1 for calling the FileMetadata obj's underlying member method code with example usage: obj.column_by_name(name) and returns: c