public Collection<VarnodeSymbol> getVarnodeTable() {
		return Collections.unmodifiableList(Arrays.asList(varnode_table));
	}
A ValueSymbol where the semantic context is obtained by looking
up the value in a table of VarnodeSymbols
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/symbol/VarnodeListSymbol.java