public final void printStackTrace(int instructionOffset, PrintLN out) {
public final void printStackTrace(Offset instructionOffset, PrintLN out) {
  public final void printStackTrace(int instructionOffset, PrintLN out) {    out.print("\tat ");    out.print(method.getDeclaringClass()); // VM_Class    out.print('.');    out.print(method.getName()); // a VM_Atom, returned via VM_MemberReference.getName().    out.print("(");    out.print(method.getDeclaringClass().getSourceName()); // a VM_Atom    int lineNumber = findLineNumberForInstruction(instructionOffset);    if (lineNumber <= 0) {      // unknown line      out.print("; machine code offset: ");      out.printHex(instructionOffset);    } else {      out.print(':');      out.print(lineNumber);    }    out.print(')');    out.println();  }