public TypeList makeTypeList(int offset, int size) {
    if (size == 0) {
      return StdTypeList.EMPTY;
    }

    if (pool == null) {
      throw new IllegalStateException("pool not yet initialized");
    }

    return new DcfTypeList(bytes, offset, size, pool, observer);
  }
Constructs and returns an instance of {@link TypeList} whose data comes from the bytes of this
instance, interpreted as a list of constant pool indices for classes, which are in turn
translated to type constants. Instance construction will fail if any of the (alleged) indices
turn out not to refer to constant pool entries of type {@code Class}.

@param offset offset into {@link #bytes} for the start of the data
@param size number of elements in the list (not number of bytes)
@return {@code non-null;} an appropriately-constructed class list
android/android_framework/dex-maker/src/main/java/com/android/dx/cf/direct/DirectClassFile.java