code: def _annotation_stmt(self, stmt: Statement, sctx: SchemaContext) -> None:
          
          if not sctx.schema_data.if_features(stmt, sctx.text_mid):
              return
          dst = stmt.find1("description")
          self.annotations[(stmt.argument, sctx.default_ns)] = Annotation(
              DataType._resolve_type(stmt.find1("type", required=True), sctx),
              dst.argument if dst else None)
docs: Handle annotation statement.