anchor.diff:  ENV GOLANG_VERSION 1.13.3
   
   RUN curl -sSL https://storage.googleapis.com/golang/go$GOLANG_VERSION.linux-amd64.tar.gz \
  -		| tar -v -C /usr/local -xz
  +		| tar -C /usr/local -xz
   
   # RUN wget https://dl.google.com/go/go1.13.3.linux-amd64.tar.gz && tar -xvf go1.13.3.linux-amd64.tar.gz && mv go /usr/local
   # RUN export GOROOT=/usr/local/go && export GOPATH=$HOME/go && export PATH=$GOPATH/bin:$GOROOT/bin:$PATH
  
positive.code: 
  # build go lang examples first in a separate layer
  
  FROM apachepulsar/pulsar-all:latest as pulsar-function-go
  
  USER root
  
  
negative.code:     && apt-get autoclean \
      && rm -rf /var/lib/apt/lists/*
  
  CMD bash
  