public Iterator<Integer> getOperandIndexIterator() {
		return Collections.unmodifiableList(indices).iterator();
	}
Get an iterator over the operand indices

<p>
If this iterator is advanced for each non-terminal, while simultaneously iterating over the
RHS of the associated production, then this will identify the corresponding operand index for
each non-terminal

@return the iterator
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/sleigh/sem/AssemblyConstructorSemantic.java