google/generativeai/responder.py [497:523]:
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                    )
                self._index[declaration.name] = declaration

    def __getitem__(
        self, name: str | protos.FunctionCall
    ) -> FunctionDeclaration | protos.FunctionDeclaration:
        if not isinstance(name, str):
            name = name.name

        return self._index[name]

    def __call__(self, fc: protos.FunctionCall) -> protos.Part | None:
        declaration = self[fc]
        if not callable(declaration):
            return None

        response = declaration(fc)
        return protos.Part(function_response=response)

    def to_proto(self):
        return [tool.to_proto() for tool in self._tools]


ToolsType = Union[Iterable[ToolType], ToolType]


def _make_tools(tools: ToolsType) -> list[Tool]:
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google/generativeai/types/content_types.py [865:891]:
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                    )
                self._index[declaration.name] = declaration

    def __getitem__(
        self, name: str | protos.FunctionCall
    ) -> FunctionDeclaration | protos.FunctionDeclaration:
        if not isinstance(name, str):
            name = name.name

        return self._index[name]

    def __call__(self, fc: protos.FunctionCall) -> protos.Part | None:
        declaration = self[fc]
        if not callable(declaration):
            return None

        response = declaration(fc)
        return protos.Part(function_response=response)

    def to_proto(self):
        return [tool.to_proto() for tool in self._tools]


ToolsType = Union[Iterable[ToolType], ToolType]


def _make_tools(tools: ToolsType) -> list[Tool]:
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