code: def to_schema(self):
          
          types = set()
          generated_schemas = []
          for schema_generator in self._schema_generators:
              generated_schema = schema_generator.to_schema()
              if len(generated_schema) == 1 and 'type' in generated_schema:
                  types.add(generated_schema['type'])
              else:
                  generated_schemas.append(generated_schema)
  
          if types:
              if len(types) == 1:
                  (types,) = types
              else:
                  types = sorted(types)
              generated_schemas = [{'type': types}] + generated_schemas
          if len(generated_schemas) == 1:
              (result_schema,) = generated_schemas
          elif generated_schemas:
              result_schema = {'anyOf': generated_schemas}
          else:
              result_schema = {}
  
          return result_schema
docs: Convert the current schema to a `dict`.