fix (Azure#30680)

Author: msyyc

tools/azure-sdk-tools/packaging_tools/multiapi_combiner.py

@@ -271,12 +271,12 @@ def _get_names_by_api_version(api_version: str):
         def _get_operation(code_model: "CodeModel", name: str) -> Operation:
             return Operation(code_model, name, operation_group=self)
 
-        self.operations = _combine_helper(
+        self.operations = [o for o in _combine_helper(
             code_model=self.code_model,
             sorted_api_versions=api_versions,
             get_cls=_get_operation,
             get_names_by_api_version=_get_names_by_api_version,
-        )
+        ) if o.name != "_api_version"]
 
     def doc(self, async_mode: bool) -> str:
         return strip_version_from_docs(self.generated_class(async_mode).__doc__)

tools/azure-sdk-tools/packaging_tools/templates/multiapi_combiner/operation_group.py.jinja2

@@ -18,9 +18,8 @@ class {{ operation_group.name }}{{ "(" + operation_group.name.replace("Operation
         self._deserialize = input_args.pop(0) if input_args else kwargs.pop("deserializer")
         self._api_version = input_args.pop(0) if input_args else kwargs.pop("api_version")
 {% else %}
-    @property
-    def _api_version(self)-> str:
-        return self._get_api_version(None)
+    def _api_version(self, op_name: str) -> str:
+       return self._get_api_version(op_name)
 
 {% endif %}
     {% for operation in operation_group.operations %}