This is a direct quote from the Liberal Democrat manifesto published today -
"Keeping the UK in the EU will remove the basis for the SNP’s divisive proposed referendum on independence."
With the exception of the word "divisive", I don't think anyone in the SNP would disagree with that. The one and only reason another independence referendum has been proposed relatively soon after the last one is that Scotland is being dragged out of the EU against its will. In the highly unlikely event that the United Kingdom never leaves the EU, the grounds for holding a referendum in the near future will no longer exist.
But of course the reverse is also true. If keeping the UK in the EU removes the basis for a referendum, failing to keep the UK in the EU will by definition ensure that the basis for a referendum remains intact. The Liberal Democrats should be congratulated for implicitly (and probably accidentally) conceding that vitally important democratic point.