def METHOD_NAME(self):
    """Return a message to update the metric on the web interface."""
    result = ''
    performance = 0
    # For each segment, adds the performance to the total, and displays
    # corresponding label.
    for i in range(0, 4):
        performance = performance + self.segments[i].getPerformance()
        result = result + ("%.4f|" % self.segments[i].getPerformance())
    result = result + ("%.4f" % (performance / 4))
    return result