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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_tool_context(self, tool_alias):
 """Given a visible tool alias, return the name of the context it belongs to. Args: tool_alias (str):
 Tool alias to search for. Returns: (str):
 Name of the context that exposes a visible instance of this tool alias, or None if the alias is not available. """

        tools_dict = self.get_tools()
        data = tools_dict.get(tool_alias)
        if data:
            return data["context_name"]
        return None