Function nest

Turn a TLV class into a field type, where the TLV is nested inside the field.

Example

Given this structure:

Outer = OUTER-TYPE TLV-LENGTH Middle
Middle = MIDDLE-TYPE TLV-LENGTH Inner
Inner = INNER-TYPE TLV-LENGTH INNER-VALUE
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You can define the Outer builder:

const buildOuter = new StructBuilder("Outer", TT.Outer)
  .add(TT.Middle, "inner", StructFieldType.nest(Inner));
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Inner type does not have to encode itself as a TLV. Its encoding result appears as the TLV-VALUE of the "middle" field TLV.