code: protected boolean isAugmentable(String configKey) {
  		boolean rets = (configKey.endsWith(PropertiesBundleConstant.BUNDLE_FACTORY_CUSTOM_NAMES) || // Bundles
  				configKey.endsWith(PropertiesBundleConstant.BUNDLE_FACTORY_CUSTOM_MAPPINGS) || // mappings
  				configKey.endsWith(PropertiesBundleConstant.BUNDLE_FACTORY_CUSTOM_COMPOSITE_NAMES) || // children
  																										// of
  																										// composites
  				configKey.equals(PropertiesBundleConstant.CUSTOM_POSTPROCESSORS
  						+ PropertiesBundleConstant.CUSTOM_POSTPROCESSORS_NAMES)
  				|| // Postprocessors
  					// definition
  				configKey.equals(PropertiesBundleConstant.PROPS_PREFIX + PropertiesBundleConstant.CUSTOM_GENERATORS)); // Generators
  																														// definition
  
  		rets = rets && configProperties.containsKey(configKey);
  		return rets;
  	}
docs: Determine whether a property is augmentable (so instead of overriding,
  values are appended to the current values).
  
  @param configKey
  the configuration key
  @return true if the property is augmentable or not.