List<PsiType[]> (@NotNull GrFunctionalExpression expression) { GrMethodCall call = findCall(expression); if (call == null) return Collections.emptyList(); GroovyResolveResult variant = call.advancedResolve(); List<PsiType[]> expectedSignatures = inferExpectedSignatures(variant, call, expression); final GrParameter[] parameters = expression.getAllParameters(); return ContainerUtil.findAll(expectedSignatures, types -> types.length == parameters.length); }