add proxy for the first part and try to develop the second part

Webcal-python/venv/lib/python3.11/site-packages/tatsu/synth.py

@@ -0,0 +1,31 @@
+from collections.abc import Mapping
+from typing import Any
+
+__REGISTRY: Mapping[str, Any] = vars()
+
+
+class _Synthetic:
+    def __reduce__(self):
+        return (
+            synthesize(type(self).__name__, type(self).__bases__),
+            (),
+            vars(self),
+        )
+
+
+def synthesize(name, bases):
+    typename = f'{__name__}.{name}'
+
+    if not isinstance(bases, tuple):
+        bases = (bases,)
+
+    if _Synthetic not in bases:
+        bases += (_Synthetic,)
+
+    constructor = __REGISTRY.get(typename)
+    if not constructor:
+        constructor = type(name, bases, {})
+        typename = constructor.__name__
+        __REGISTRY[typename] = constructor
+
+    return constructor