code: function (chain) {
          if (chain.previousChain) {
              chain.previousChain.unpipe(chain);
              chain.previousChain.pipe(this);
  
              chain.previousChain.nextChain = this;
  
          }
          if (this.autoEnhance) {
              this.enhanceForeignStream(chain);
          }
  
          this.pipe(chain);
          chain.previousChain = this;
          this.nextChain = chain;
          return this;
      }
docs: Chain this chain before the stream given as parameter
  @param {stream.Writable|stream.Transform|stream.Duplex} chain - Next stream
  @returns {Pipe.Chain}