public Type peekType(int n) {
    return peek(n).getType();
  }
Peeks at the {@code n}th element down from the top of the stack, returning the type per se, as
opposed to the <i>type-bearer</i>. This method is just a convenient shorthand for {@code
peek(n).getType()}.

@see #peek
android/android_framework/dex-maker/src/main/java/com/android/dx/cf/code/ExecutionStack.java