void addToVersion(BufferNode versionHead) {
		prevVersion = versionHead;
		nextVersion = versionHead.nextVersion;
		versionHead.nextVersion.prevVersion = this;
		versionHead.nextVersion = this;
	}
Link this node to the top of the version list.
@param versionHead
Ghidra/Framework/DB/src/main/java/db/buffers/BufferNode.java