@staticmethod
def _checkVerbosity(invVerbosity):
    """
        Check for valid values of invVerbosity (if invalid an exception is thrown)
        :param invVerbosity: [int or str]
        :return: None
        """
    if type(invVerbosity) is str:
        if invVerbosity == '':
            raise ValueError('Passed empty string!')
        if invVerbosity.isdigit():
            pass
        elif invVerbosity[0] == '-':
            if invVerbosity[1:].isdigit():
                pass
            else:
                raise ValueError('Passed str could not be converted to int!')
        else:
            raise ValueError('Passed invalid str!')
    elif type(invVerbosity) is int:
        pass
    else:
        raise TypeError('Type must be either str or int!')
