public void pop(int n) {
    throwIfImmutable();

    size -= n;
  }
Pops N elements off the end of the list and decreasing the size by N.

@param n {@code >= 0;} number of elements to remove from end
@throws IndexOutOfBoundsException if stack is smaller than N
android/android_framework/dex-maker/src/main/java/com/android/dx/util/IntList.java