public HighSymbol findLocal(Address addr, Address pc) {
		MappedVarKey key = new MappedVarKey(addr, pc);
		return addrMappedSymbols.get(key);
	}
Find any local variable (including input params) by address
@param addr - variable storage address
@param pc = Address of first use, or null if address
            is valid throughout the entire scope
@return HighLocal or null
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/LocalSymbolMap.java