code: def downgrade():
      op.alter_column(
          "report_schedule",
          "extra_json",
          new_column_name="extra",
          existing_type=Text,
          existing_nullable=True,
      )
  
imports: from alembic import op
  from sqlalchemy.types import Text
label_desc: Use image node_id 2 for calling a global function with example usage: downgrade() without return types