lua.wetgenes.json.decode
json_table = wjson.decode(json_string)
json_table = wjson.decode(json_string,opts)
Convert a json string into a lua table.
Set opts.null to wetgenes.json.null (or indeed any other value) if you would like to have this as nulls in your results. By default nulls are replaced with nil and therefore invisible.
Any object key string that looks like a number will be converted to a number. This will probably reverse any numbers we converted to strings when encoding. Set opts.keystring=true to turn off this behaviour.