def _applySpecial_MeshOpts_vertexData(args, overlayList, displayCtx, target):
    """Applies the :attr:`.MeshOpts.vertexData` option. """
    import fsleyes.actions.loadvertexdata as loadvertexdata
    vertexData = list(args.vertexData)
    last = len(args.vertexData) - 1
    for i, vd in enumerate(vertexData):
        vertexData[i] = loadvertexdata.loadVertexData(target.overlay,
            displayCtx, vd, select=i == last)
    target.vertexData = vertexData[0]
