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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 load_all(self):
        '''
        Helper function for actual Insights client use
        '''
        # check for custom conf file before loading conf
        self._load_command_line(conf_only=True)
        self._load_config_file()
        self._load_env()
        self._load_command_line()
        self._imply_options()
        self._validate_options()
        return self