@Override
	public VariableStorage getStorage() {
		return storage;
	}
Construct given a symbol, storage, and first-use Address
@param sym is the given symbol
@param store is the given storage
@param addr is the first-use Address (or null)
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/MappedEntry.java