public Buffer getData() {
        return data;
    }
Returns the raw internal data buffer used by this VertexBuffer.
This buffer is not safe to call from multiple threads since buffers
have their own internal position state that cannot be shared.
Call getData().duplicate(), getData().asReadOnlyBuffer(), or
the more convenient getDataReadOnly() if the buffer may be accessed
from multiple threads.

@return A native buffer, in the specified {@link Format format}.
jme3-core/src/main/java/com/jme3/scene/VertexBuffer.java