class StringType implements PrimitiveType, State, Command {

    @Override
    public boolean equals(@Nullable Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (obj instanceof String) {
            return obj.equals(value);
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        StringType other = (StringType) obj;
        return Objects.equals(this.value, other.value);
    }

    public  StringType();
    public  StringType(@Nullable String value);

}