void () { PsiLambdaExpression expression = (PsiLambdaExpression)getElementFactory().createExpressionFromText("() -> 123", myFixture.addClass("class Empty{}")); checkWithExpected(FunctionalInterfaceSuggester.suggestFunctionalInterfaces(expression), "java.util.concurrent.Callable<java.lang.Integer>", "java.util.function.DoubleSupplier", "java.util.function.IntSupplier", "java.util.function.LongSupplier", "java.util.function.Supplier<java.lang.Integer>"); }