/// <summary>
/// Accesses the given field span.
/// </summary>
/// <param name="fieldSpan">The field span.</param>
/// <returns>The new field reference.</returns>
public FieldRef Access(FieldSpan fieldSpan) =>
IsDirect
? new FieldRef(Source, fieldSpan)
: new FieldRef(Source, FieldSpan.Narrow(fieldSpan));
/// <summary>
/// Constructs a new direct reference to the given node.
/// </summary>
/// <param name="source">The main source.</param>
/// <param name="fieldSpan">The field span.</param>
public FieldRef(Value source, FieldSpan fieldSpan)
{
Source = source;
span = fieldSpan;
}