// only one multi-type argument per declaration for now
// also allows only one combo right now (File/S with newFile)
// example:
// sS loadTextFile(File/S file) { ... }
svoid tok_multiTypeArguments_v2(LS tok) {
  int i;
  
  while ((i = jfind(tok, "File/<id> <id>", (_tok, nIdx) ->
    eqGetOneOf(_tok, nIdx+5, "S", "String"))) >= 0) {
      
    S argName = tok.get(i+6);
    S mainType = tok.get(i), altType = tok.get(i+4);
    S converter = "newFile";
    S expr = converter + "(" + argName + ")";
    
    tok_expandMultiTypeArgument(tok,
      i, i+8,
      argName,
      mainType, altType, expr);
  }
  
  while ((i = jfind(tok, "<id> etc <id>")) >= 0) {
    S mainType = tok.get(i);
    S argName = tok.get(i+4);
    int iArgEnd = i+6;
    
    S altType, converter;
    if (eq(mainType, "Graphics2D")) {
      altType = "BufferedImage";
      converter = "graphics";
    } else if (eq(mainType, "IIntegralImage")) {
      altType = "BufferedImage";
      converter = "IntegralImage";
    } else if (eq(mainType, "BufferedImage")) {
      altType = "MakesBufferedImage";
      converter = "toBufferedImage";
    } else
      fail("Unknown multi-type: " + joinSubList(tok, i, iArgEnd));
      
    S expr = converter + "(" + argName + ")";
    
    tok_expandMultiTypeArgument(tok,
      i, iArgEnd,
      argName,
      mainType, altType, expr);
  }  
}