Link to pressingrecipe
Link to 导入类
It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.
Link to extending-processingrecipe
Link to 已实现的接口
PressingRecipe implements the following interfaces. That means all methods defined in these interfaces are also available in PressingRecipe