java-symbol-solver-model/src/main/java/com/github/javaparser/symbolsolver/model/resolution/SymbolReference.java
public static <S extends ResolvedDeclaration, S2 extends S> SymbolReference<S> unsolved(Class<S2> clazz) {
        return new SymbolReference<>(Optional.empty());
    }
public static <S extends ResolvedDeclaration, S2 extends S> SymbolReference<S> unsolved(Class<S2> clazz) {
        return new SymbolReference<>(Optional.empty());
    }
Create an unsolved reference specifying the type of the value expected.