private int param(int bytes, int alignment) {
        // Upward align the current offset to the specified alignment
        int param = (offset + (alignment - 1)) & -alignment;
        ensureCapacity(offset = param + bytes);
        return param;
    }
Returns the {@link ByteBuffer} that backs this {@link APIBuffer}.
jme3-lwjgl3/src/main/java/com/jme3/lwjgl3/utils/APIBuffer.java