After you've specified the name, source, and target for the transformation, you can define mapping.
在您指定名称、源文件和转换的目标之后，您就可以定义映射表了。
2
The name of the parameter doesn't matter, because it is ignored during transformation, but it is better to select a name that properly identifies it as an exception being thrown.
在转换过程中，参数名是可以被忽略的，但最好还是定义一个合适的名称（以备异常抛出时正确提示）。
3
If defaulting to class name, the transformation may alias the class name to ensure that it is a valid EGL name.