code: function(err, keywords) {
          if (err || keywords.status === 'ERROR') {
            node.status({fill:'red', shape:'ring', text:'call to alchmeyapi vision service failed'});
            console.log('Error:', msg, err);
            node.error(err, msg);
          }
          else {
            msg.result = keywords[FEATURE_RESPONSES[feature]] || [];
            msg.fullresult = {};
            msg.fullresult['all'] = keywords;
            node.send(msg);
          }
        }
docs: This is the callback after the call to the alchemy service. Set up as a var within this scope, so it has access to node, msg etc. in preparation for the Alchemy service action