@Override
	public int hashCode() {
		return (int) (id ^ (id >>> 32));
	}
Get the symbol associated with this row object.  If symbol no longer exists
null may be returned.
@return associated symbol or null if symbol not found or has been deleted
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/symtable/SymbolRowObject.java