public ValueUpdate getValueUpdate(int index) {
        return valueUpdates.get(index);
    }
Get the value update at the specified index in the list of value updates.

@param index the index of the ValueUpdate to return
@return the ValueUpdate at the specified index
@throws IndexOutOfBoundsException if index is out of range
document/src/main/java/com/yahoo/document/update/FieldUpdate.java