return null; }
  final VM_Field findDeclaredField(VM_Atom fieldName, VM_Atom fieldDescriptor) {    if (VM.VerifyAssertions) VM.assert(isLoaded());    for (int i = 0, n = declaredFields.length; i < n; ++i) {      VM_Field field = declaredFields[i];      if (field.getName() == fieldName && 	  field.getDescriptor() == fieldDescriptor)	return field;    }