@Override
	public TraceMemoryStatePcodeExecutorStatePiece fork() {
		MutableULongSpanMap<TraceMemoryState> copyUnique = new DefaultULongSpanMap<>();
		copyUnique.putAll(unique);
		return new TraceMemoryStatePcodeExecutorStatePiece(data, copyUnique);
	}
Construct a piece

@param data the trace-data access shim
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/pcode/exec/trace/TraceMemoryStatePcodeExecutorStatePiece.java