code: public boolean isDefault(SqlLineProperty property) {
      final String defaultValue = String.valueOf(property.defaultValue());
      final String currentValue = get(property);
      return String.valueOf((Object) null).equals(currentValue)
          || Objects.equals(currentValue, defaultValue);
    }
docs: Returns whether the property is its default value.
  
  <p>This true if it has not been assigned a value,
  or if has been assigned a value equal to its default value.
  
  @param property Property
  @return whether property has its default value