// e.g.:
// sclass Bla extends Stages & Var<S> {

svoid tok_andVarMixIn(LS tok) {
  for (i : jfindAll_reversed_any(tok, 
    "& Var<<id>> {",
    "& Var<<id><<id>>> {")) {
    int iOpening = indexOf(tok, i, "{");
    S valueType = tok_scanTypeArgWithoutBrackets(tok, indexOf(tok, i, "<"));
    
    // get Var include
    LS tokVar = javaTok(cacheGet(#1032845));
    jreplace(tokVar, "A", valueType);
    
    tokReplace_reTok(tok, iOpening+1, "\n"
      + join(tokVar) + "\n");
    tokReplace_reTok(tok, i, i+3, "implements IVar");
  }
}