code: protected boolean overrideHashcode(MethodBodyCreator creator) {
  
          Method hashCode = null;
          ClassMetadataSource data = reflectionMetadataSource.getClassMetadata(Object.class);
          try {
              hashCode = data.getMethod("hashCode", Integer.TYPE);
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
          return overrideMethod(hashCode, MethodIdentifier.getIdentifierForMethod(hashCode), creator);
      }
docs: Override the hashCode method using the given {@link MethodBodyCreator}.
  
  @param creator the method body creator to use
  @return true if the method was not already overridden