code: func (l *CallerInfo) IsCallerInfoEnabled(module string, level api.Level) bool {
  	showcaller, exists := l.showcaller[callerInfoKey{module, level}]
  	if !exists {
  		//If no callerinfo setting exists, then look for default
  		showcaller, exists = l.showcaller[callerInfoKey{"", level}]
  		if !exists {
  			return true
  		}
  	}
  	return showcaller
  }
docs: //IsCallerInfoEnabled returns if callerinfo enabled for given module and level