@Override
    public String toString() {
        return new StringBuilder().append('(').append(getLeft()).append(',').append(getRight()).append(')').toString();
    }
<p>Returns a String representation of this pair using the format {@code ($left,$right)}.</p>

@return a string describing this object, not null
android/android_framework/base/src/main/java/lang3/tuple/Pair.java