@Deprecated
    public RenderBuffer getColorBuffer() {
        if (colorBufs.isEmpty()) {
            return null;
        }
        if (colorBufIndex < 0 || colorBufIndex >= colorBufs.size()) {
            return colorBufs.get(0);
        }
        return colorBufs.get(colorBufIndex);
    }
@return The color buffer with the index set by {@link #setTargetIndex(int)}, or null
if no color buffers are attached.
If MRT is disabled, the first color buffer is returned.
@deprecated Use getColorTarget()
jme3-core/src/main/java/com/jme3/texture/FrameBuffer.java