code: def downgrade():
      """Unapply Add has_import_errors column to DagModel"""
      with op.batch_alter_table("dag") as batch_op:
          batch_op.drop_column(
              "has_import_errors", mssql_drop_default=True
          )
  
imports: from __future__ import annotations
  import sqlalchemy
  from alembic import op
label_desc: Use image node_id 2 for calling a global function with example usage: downgrade() without return types