/// <summary>
/// write by <see cref="Writable.ToString"/>. ignore if <paramref name="value"/> is null
/// </summary>
/// <param name="value"></param>
public void Write(Writable value)
{
if (value != null)
{
WriteIndent();
builder.Append(value.ToString());
}
}
public Attribute(Writable name, Writable value)
{
Name = name;
Value = value;
}
