code: public B camundaInAllVariables(String variables, boolean local) {
      CamundaIn param = modelInstance.newInstance(CamundaIn.class);
  
      param.setCamundaVariables(variables);
  
      if (local) {
        param.setCamundaLocal(local);
      }
  
      addExtensionElement(param);
  
      return myself;
    }
docs: Sets a "camunda:in" parameter to pass all the process variables of the
  signal-throwing process instance to the signal-catching process instance
  
  @param variables a String flag to declare that all of the signal-throwing process-instance variables should be passed
  @param local a Boolean flag to declare that only the local variables should be passed
  @return the builder object