'Get or create logger (if it does not exist)
@rtype: RootLogger'

@staticmethod
def get_logger():

    name = Logr.get_logger_name()
    if (name not in Logr.loggers):
        Logr.configure_check()
        Logr.loggers[name] = logging.Logger(name)
        Logr.loggers[name].addHandler(Logr.handler)
    return Logr.loggers[name]
