Class transformer2

python/pathway/tests/test_transformers.py:784–799

    @transformer
    class transformer2:
        # reusing the names on purpose for more testing
        class hypers(ClassArg):
            a: int = input_attribute()

        class table(ClassArg):
            a: int = input_attribute()
            h: int = input_attribute()

            @output_attribute
            def b(self) -> int:
                return self.a * 100 + self.transformer.hypers[self.h].a

            @method
            def c(self, arg) -> int:
                return (self.a + self.b) * arg

    @transformer
    class transformer_common: