Object defaultValue = ArbitraryInstances.get(rawType);
    if (defaultValue != null) {
      return defaultValue;
    }

    final String typeName = rawType.getCanonicalName();
    if (JUF_METHODS.containsKey(typeName)) {
      // Generally, methods that accept java.util.function.* instances
      // don't like to get null values.  We generate them dynamically

    Object defaultValue = ArbitraryInstances.get(rawType);
    if (defaultValue != null) {
      return defaultValue;
    }

    final String typeName = rawType.getCanonicalName();
    if (JUF_METHODS.containsKey(typeName)) {
      // Generally, methods that accept java.util.function.* instances
      // don't like to get null values.  We generate them dynamically

      }
      StringBuilder signature =
          new StringBuilder()
              .append(typeName(method.getReturnType()))
              .append(" ")
              .append(method.getName())
              .append("(");
      String sep = "";
      for (Class<?> param : method.getParameterTypes()) {
        signature.append(sep).append(typeName(param));
        sep = ", ";
      }
      methods.add(signature.append(")").toString());

      if (ownerType != null && JavaVersion.CURRENT.jdkTypeDuplicatesOwnerName()) {
        builder.append(JavaVersion.CURRENT.typeName(ownerType)).append('.');
      }
      return builder
          .append(rawType.getName())
          .append('<')
          .append(COMMA_JOINER.join(transform(argumentsList, JavaVersion.CURRENT::typeName)))
          .append('>')
          .toString();
    }

    @Override
    public int hashCode() {

      }
      StringBuilder signature =
          new StringBuilder()
              .append(typeName(method.getReturnType()))
              .append(" ")
              .append(method.getName())
              .append("(");
      String sep = "";
      for (Class<?> param : method.getParameterTypes()) {
        signature.append(sep).append(typeName(param));
        sep = ", ";
      }
      methods.add(signature.append(")").toString());