import json

class i3bar:
    def __init__(self):
        self._data = []
    def start(self):
        return json.dumps({ "version": 1 }) + "["

    def add(self, obj):
        self._data.append({
            "full_text": obj.data()
        })

    def get(self):
        data = json.dumps(self._data)
        self._data = []
        return data + ","

    def stop(self):
        return "]"

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