Add the given {@link ByteBuf} on the specific index.
<p>
Be aware that this method does not increase the {@code writerIndex} of the {@link CompositeByteBuf}.
If you need to have it increased use {@link #addComponent(bool, int, ByteBuf)}.
<p>
{@link ByteBuf#release()} ownership of {@code buffer} is transferred to this {@link CompositeByteBuf}.
@param cIndex the index on which the {@link ByteBuf} will be added.
@param buffer the {@link ByteBuf} to add. {@link ByteBuf#release()} ownership is transferred to this
{@link CompositeByteBuf}.
Add the given {@link ByteBuf} on the specific index. <p> Be aware that this method does not increase the {@code writerIndex} of the {@link CompositeByteBuf}. If you need to have it increased use {@link #addComponent(bool, int, ByteBuf)}. <p> {@link ByteBuf#release()} ownership of {@code buffer} is transferred to this {@link CompositeByteBuf}. @param cIndex the index on which the {@link ByteBuf} will be added. @param buffer the {@link ByteBuf} to add. {@link ByteBuf#release()} ownership is transferred to this {@link CompositeByteBuf}.