public final HttpClientBuilder addExecInterceptorLast(final String name, final ExecChainHandler interceptor) {
        Args.notNull(name, "Name");
        Args.notNull(interceptor, "Interceptor");
        if (execInterceptors == null) {
            execInterceptors = new LinkedList<>();
        }
        execInterceptors.add(new ExecInterceptorEntry(ExecInterceptorEntry.Position.LAST, name, interceptor, null));
        return this;
    }
Add an interceptor to the tail of the processing list.

@return this instance.
httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/HttpClientBuilder.java