private static Map<Set<TypeParameter>, Constructor<?>> findConstructors(Class<?> clazz) {
ImmutableMap.Builder<Set<TypeParameter>, Constructor<?>> builder = ImmutableMap.builder();
for (Constructor<?> constructor : clazz.getConstructors()) {
Set<TypeParameter> typeParameters = new HashSet<>();
Stream.of(constructor.getAnnotationsByType(TypeParameter.class)).forEach(typeParameters::add);
builder.put(typeParameters, constructor);
}
return builder.build();
}
