public void createFixture(JavaClassGenerator classGen) {
    MethodGen methodGen =
        new MethodGen(
            Constants.ACC_PUBLIC | Constants.ACC_STATIC, // public and static
            org.apache.bcel.generic.Type.VOID, // return type
            new org.apache.bcel.generic.Type[] // parameters
            {this.getDefiningClass().toBCEL()},
            null, // parameters names: we do not care
            "fixture" + fixtureNum, // method's name
            classGen.getClassName(), // defining class
            classGen.generateJavaBytecode(getCode()), // bytecode of the method
            classGen.getConstantPool()); // constant pool

    // we must always call these methods before the getMethod()
    // method below. They set the number of local variables and stack
    // elements used by the code of the method
    methodGen.setMaxStack();
    methodGen.setMaxLocals();

    // we add a method to the class that we are generating
    classGen.addMethod(methodGen.getMethod());
  }