@Nullable static List<MethodSignature> findFunctionCandidates(PsiClass psiClass) { if (psiClass instanceof PsiAnonymousClass) { psiClass = PsiUtil.resolveClassInType(((PsiAnonymousClass) psiClass).getBaseClassType()); } if (psiClass != null && psiClass.isInterface()) { final List<MethodSignature> methods = new ArrayList<MethodSignature>(); final Collection<HierarchicalMethodSignature> visibleSignatures = psiClass.getVisibleSignatures(); for (HierarchicalMethodSignature signature : visibleSignatures) { final PsiMethod psiMethod = signature.getMethod(); if (!psiMethod.hasModifierProperty(PsiModifier.ABSTRACT)) continue; if (psiMethod.hasModifierProperty(PsiModifier.STATIC)) continue; if (!overridesPublicObjectMethod(psiMethod)) { methods.add(signature); } } return hasSubsignature(methods); } return null; }