public BaseProcessingEnvImpl() {
_addedUnits = new ArrayList<ICompilationUnit>();
_addedClassFiles = new ArrayList<ReferenceBinding>();
_deletedUnits = new ArrayList<ICompilationUnit>();
_elementUtils = new ElementsImpl(this);
_typeUtils = new TypesImpl(this);
_factory = new Factory(this);
_errorRaised = false;
}