out.println("public interface "+className+" extends Derivative {"); out.println("}");
println(out,"public interface "+className+" extends Derivative {"); println(out,"}");
    void writeDenominatorClass(String context, String className) throws Exception {      String outname = className + ".java";      noteFile(outname);      if (cleanp) {        (new File(outname)).delete();        return;      }      debug("Writing Derivative Measure Denominator Class \""+className+"\" for \""+            context+"\" to \""+outname+"\"");      FileOutputStream fos = new FileOutputStream(new File(getTargetDir(),outname));      OutputStreamWriter osw = new OutputStreamWriter(fos);      PrintWriter out = new PrintWriter(osw);            writePrelude(out, context, className, outname);      out.println("/** Implemented by Measures which represent derivatives with\n"+                  " * respect to "+toClassName(context)+".\n"+                  " *\n"+                  " * Derivative.getDenominatorClass() will always\n"+                  " * return "+toClassName(context)+"\n"+                  " **/");      out.println("public interface "+className+" extends Derivative {");      out.println("}");      out.close();    }