code: private String getCompilerArgValue(String compilerArgName, String compilerArgValue) {
  		if (compilerArgName.equals(COMPILATION_LEVEL)) {
  			if (!ADVANCED_OPTIMIZATIONS_COMPILATION_LEVEL.equalsIgnoreCase(compilerArgValue)
  					&& !WHITESPACE_ONLY_COMPILATION_LEVEL.equalsIgnoreCase(compilerArgValue)
  					&& !SIMPLE_OPTIMIZATIONS_COMPILATION_LEVEL.equalsIgnoreCase(compilerArgValue)) {
  
  				if (StringUtils.isNotEmpty(compilerArgValue)) {
  					LOGGER.debug("Closure compilation level defined in config '" + compilerArgValue
  							+ "' is not part of the available "
  							+ "ones [WHITESPACE_ONLY, SIMPLE_OPTIMIZATIONS, ADVANCED_OPTIMIZATIONS");
  				}
  				compilerArgValue = WHITESPACE_ONLY_COMPILATION_LEVEL;
  			}
  
  			LOGGER.debug("Closure compilation level used : " + compilerArgValue);
  
  		}
  		return compilerArgValue;
  	}
docs: Returns the compiler argument value
  
  @param compilerArgName
  the compiler argument name
  @param compilerArgValue
  the compiler argument name
  @return the compiler argument value