Builds a command with keywords

        Notes:
            Negating a command string by overriding 'value' with None or an
                assigned value that evalutates to false has been deprecated.
                Please use 'disable' to negate a command.

            Parameters are evaluated in the order 'default', 'disable', 'value'

        Args:
            string (str): The command string
            value (str): The configuration setting to subsititue into the
                command string. If value is a boolean and True, just the
                command string is used
            default (bool): Specifies the command should use the default
                keyword argument. Default preempts disable and value.
            disable (bool): Specifies the command should use the no
                keyword argument. Disable preempts value.

        Returns:
            A command string that can be used to configure the node

def command_builder(self, string, value=None, default=None, disable=None):
        """Builds a command with keywords

        Notes:
            Negating a command string by overriding 'value' with None or an
                assigned value that evalutates to false has been deprecated.
                Please use 'disable' to negate a command.

            Parameters are evaluated in the order 'default', 'disable', 'value'

        Args:
            string (str): The command string
            value (str): The configuration setting to subsititue into the
                command string. If value is a boolean and True, just the
                command string is used
            default (bool): Specifies the command should use the default
                keyword argument. Default preempts disable and value.
            disable (bool): Specifies the command should use the no
                keyword argument. Disable preempts value.

        Returns:
            A command string that can be used to configure the node
        """
        if default:
            return 'default %s' % string
        elif disable:
            return 'no %s' % string
        elif value is True:
            return string
        elif value:
            return '%s %s' % (string, value)
        else:
            return 'no %s' % string