public CodeAddress getStart(BasicBlock block) {
    return starts[block.getLabel()];
  }
Gets the instance for the start of the given block.

@param block {@code non-null;} the block in question
@return {@code non-null;} the appropriate instance
android/android_framework/dex-maker/src/main/java/com/android/dx/dex/code/BlockAddresses.java