docs: public IntBuffer getIntVec(String attributeName)
      {
          int size = getAttributeSize(attributeName);
          if (size <= 0)
          {
              return null;
          }
          size *= 4 * getVertexCount();
          ByteBuffer buffer = ByteBuffer.allocateDirect(size).order(ByteOrder.nativeOrder());
          IntBuffer data = buffer.asIntBuffer();
          if (!NativeVertexBuffer.getIntVec(getNative(), attributeName, data, 0, 0))
          {
              throw new IllegalArgumentException("Attribute name " + attributeName + " cannot be accessed");
          }
          return data;
      }