code: public static void assertParameterNotNull(Object parameter, String parameterName) {
  		if ( parameter == null ) {
  			throw log.parameterMustNotBeNull( parameterName );
  		}
  	}
docs: Asserts that the given method or constructor is not {@code null}.
  
  @param parameter the parameter to validate
  @param parameterName the name of the parameter, will be used in the logging message in case the given object is
  {@code null}
  @throws IllegalArgumentException in case the given parameter is {@code null}