public void set(int n, int startPc, int lineNumber) {
    set0(n, new Item(startPc, lineNumber));
  }
Sets the item at the given index.

@param n {@code >= 0, < size();} which element
@param startPc {@code >= 0;} start pc of this item
@param lineNumber {@code >= 0;} corresponding line number
android/android_framework/dex-maker/src/main/java/com/android/dx/cf/code/LineNumberList.java