Determines if the record should be logged and injects context info into the record. Always returns True

def filter(self, record):
        """Determines if the record should be logged and injects context info into the record. Always returns True"""
        fmt = LogManager.spec.context_format
        if fmt:
            data = self.context.to_dict()
            if data:
                record.context = fmt % ",".join("%s=%s" % (key, val) for key, val in sorted(data.items()) if key and val)
            else:
                record.context = ""
        return True