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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 _execute(self, command, params=None):
 """Executes a command against the underlying HTML element. Args: command: The name of the command to _execute as a string. params: A dictionary of named parameters to send with the command. Returns: The command's JSON response loaded into a dictionary object. """

        if not params:
            params = {}
        params['id'] = self._id
        return self._parent.execute(command, params)