code: private static FieldInfo cloneDeprecated(FieldInfo fieldInfo) {
  	return new FieldInfo(fieldInfo.getAccess() | Opcodes.ACC_DEPRECATED,
  		fieldInfo.getName(), fieldInfo.getDesc(),
  		fieldInfo.getSignature(), fieldInfo.getValue());
      }
docs: Clones the field info, but changes access, setting deprecated flag.
  
  @param fieldInfo
  the original field info
  @return the cloned and deprecated field info.