code: public int[] getIntArray(String attributeName)
      {
          int[] array = NativeVertexBuffer.getIntArray(getNative(), attributeName);
          if (array == null)
          {
              throw new IllegalArgumentException("Attribute name " + attributeName + " cannot be accessed");
          }
          return array;
      }
docs: Retrieves a vertex attribute as an integer array.
  The attribute name must be one of the
  attributes named in the descriptor passed to the constructor.
  @param attributeName name of the attribute to update
  @throws IllegalArgumentException if attribute name not in descriptor vertex attribute is not <i>int</i>
  @see #setIntVec(String, IntBuffer)
  @see #getIntArray(String)