code: @Override
      public HttpOutputStreamImpl getBody() {
          if (null == this.body) {
              if (HttpDispatcher.useEE7Streams()) {
                  this.body = new HttpOutputStreamEE7(this.isc);
              } else {
                  this.body = new HttpOutputStreamImpl(this.isc);
              }
              this.body.setVirtualConnection(this.connlink.getVirtualConnection());
              if (this.message != null) {
                  long messageContentLength = getContentLength();
                  if (messageContentLength != -1) { //it's set
                      this.body.setContentLength(getContentLength());
                  }
              }
          }
          return this.body;
      }
docs: /*
  @see com.ibm.websphere.http.HttpResponse#getBody()