@NotNull public static Collection<JavaClass> getClassesInPackage(@NotNull JavaPackage javaPackage) { Collection<JavaClass> classes = javaPackage.getClasses(); Set<FqName> addedQualifiedNames = new HashSet<FqName>(classes.size()); List<JavaClass> result = new ArrayList<JavaClass>(classes.size()); for (JavaClass javaClass : classes) { FqName fqName = javaClass.getFqName(); if (fqName != null && addedQualifiedNames.add(fqName)) { result.add(javaClass); } } return result; }