code: protected boolean useDefault(Object value, Class<?> toType) {
      return value == null && isDefaultValuesEnabled() && this.defaultValues.containsKey(toType);
    }
docs: Determines whether the {@link Object default value} for the specified {@link Class type}
  should be used as the converted {@link Object value} when the converted {@link Object value}
  is {@literal null}.
  
  @param value {@link Object value} to convert.
  @param toType {@link Class type} to convert the {@link Object value} into.
  @return a boolean value indicating whether the {@link Object default value} for the specified {@link Class type}
  should be used as the converted {@link Object value} when the converted {@link Object value}
  is {@literal null}.
  @see #isDefaultValuesEnabled()