auto-parse | AutoValue for ParseObject

I am having an issue while following a tutorial on the subject of HTTP Requests. I can not get the code to auto-parse my response to JSON. This remains text. While it is stated that when specifying 'json: true' this sets the type to json and parses.

Tutorial: https://www.terlici.com/2015/04/28/couchdb-node-express.html

Generated accessors of parse tree context nodes do not conform getProperty()/isProperty()/hasProperty() standard. As a result, ST can’t be applied to the parse tree directly. There seems to be 3 alternatives to apply ST to the generated parse trees:

1. Create ST model adapter classes for each generated context node. Then ST can be applied directly to the generated parse tree. Duplicate work here is creating model adapters.
2. For every parse tree node create a wrapper node that conforms getProperty()/isProperty()/hasProperty() standard. Then ST can be applied to wrapper nodes. Duplicate work here is creating wrapper nodes. (In this case parse tree is not even required; auto-parse-tree construction could be turned off and wrapper (AST) nodes could be created in grammar actions).
3. Create a Visitor. Each visit*() instantiates an ST specific to a context node being visited, sets parameters (which could be STs returned by visiting child nodes or simple strings) and returns the ST. This is the option I’m currently using. Duplicate work here is creating visitor and assigning template parameters in code.

Is there an Antlr4 option that generates accessors of parse tree context nodes that conform getProperty()/isProperty()/hasProperty() standard? Or is there an ST4 option that allows it accessing property() instead of looking for getProperty()?

It would be nice to simply instantiate an ST template with a root context node as a parameter and let ST traverse the tree.