code: private void buildDeprecatedSection(MarkupDocBuilder markupDocBuilder, PathOperation operation) {
          if (BooleanUtils.isTrue(operation.getOperation().isDeprecated())) {
              markupDocBuilder.block(DEPRECATED_OPERATION, MarkupBlockStyle.EXAMPLE, null, MarkupAdmonition.CAUTION);
          }
      }
docs: Builds a warning if method is deprecated.
  
  @param operation the Swagger Operation