code: protected void processConcurrencyAnnotation(Class clazz) {
      	if(sipContext.getConcurrencyControlMode() == null) {
  	    	Package pack = clazz.getPackage();
  	    	if(pack != null) {
  				ConcurrencyControl concurrencyControl = pack.getAnnotation(ConcurrencyControl.class);
  				if(concurrencyControl != null) {
  					if(logger.isDebugEnabled()) {
  						logger.debug("Concurrency control annotation found " + concurrencyControl.mode());
  					}
  					sipContext.setConcurrencyControlMode(concurrencyControl.mode());
  				}
  	    	}
  
      	}
  	}
docs: Check if the @ConcurrencyControl annotation is present in the package and if so process it
  @param clazz the clazz to check for @ConcurrencyControl annotation - only its package will be checked