code: def computed_doesnt_reflect_as_server_default(self):
      # note that this rule will go away when SQLAlchemy correctly
      # supports reflection of the "computed" construct; the element
      # will consistently be present as both column.computed and
      # column.server_default for all supported backends.
      return (
          self.computed_columns
          + exclusions.skip_if(
              ["postgresql", "oracle"],
              "backend reflects computed construct as a server default",
          )
          + exclusions.skip_if(self.computed_reflects_normally)
      )
  
imports: from sqlalchemy import exc
  from sqlalchemy import Index
  from sqlalchemy import text
  from alembic.testing import exclusions
  from alembic.testing.requirements import SuiteRequirements
  from alembic.util import compat
  from alembic.util import sqla_compat
label_desc: Use image node_id 42 for calling the DefaultRequirements obj's underlying member method code with example usage: obj.computed_doesnt_reflect_as_server_default() and returns: unknown