InternalComponentResources mixinResources = InternalUtils.get(
_mixinsByShortName,
mixinName);
if (mixinResources == null)
throw new TapestryException(StructureMessages.missingMixinForParameter(
_completeId,
mixinName,
parameterName), binding, null);
String simpleName = parameterName.substring(dotx + 1);