@staticmethod
def name_is_left(side, patterns=None):
    """
        Returns whether given side is a valid left side or not
        :param side: str
        :param patterns: list<str>
        :return: bool
        """
    if not patterns:
        patterns = ['L', 'l', 'Left', 'left', 'lf']
    if str(side) in patterns:
        return True
    return False
