def METHOD_NAME(self, data):
    # data['ids'] contains bugid => set(...signatures...)
    # data['signatures'] is a set of signatures with no crashes
    res = {}
    signatures = data["signatures"]
    for bugid, bug_sgns in data["ids"].items():
        if bug_sgns < signatures:
            # all the signatures in the bug have no crashes
            bugid = str(bugid)
            res[bugid] = {"id": bugid, "summary": self.summaries[bugid]}
    return res