public int getExtraBlockCount() {
    return extraBlockCount;
  }
Gets how many extra blocks will be needed to represent the block currently being translated.
Each extra block should consist of one instruction from the end of the original block.

@return {@code >= 0;} the number of extra blocks needed
android/android_framework/dex-maker/src/main/java/com/android/dx/cf/code/RopperMachine.java