nested json

[gald]

I all, i'm a newbie at gxt,
if somebody can help me to read a json like this one :


{

persons:[

{"firstName": "toto", "lastName":"Tutu", projectsName:[ "projectA", "projectB" ] }
]
}


i really don't know how to get the projectsName value.
i find some topics in extjs forums with nested json but nothing on gxt forums.

if somebody can help me ?

thanks a lot