private void insertSymbol(HighSymbol sym, Address addr) {
		long uniqueId = sym.getId();
		if ((uniqueId >> 56) == (HighSymbol.ID_BASE >> 56)) {
			long val = uniqueId & 0x7fffffff;
			if (val > uniqueSymbolId) {
				uniqueSymbolId = val;
			}
		}
		symbolMap.put(uniqueId, sym);
		addrMappedSymbols.put(addr, sym);
	}
Construct a global symbol map attached to a particular function model.
@param f is the decompiler function model
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/GlobalSymbolMap.java