‘DebugConfig‘ only refers to a type, but is being used as a value here.
to is type value as Only but used
2023-09-14 09:02:55 时间
错误消息：
试图注入一个值，但实际上DebugConfig被定义成interface，只是一个类型：
将interface替换成abstract class后问题解决：
class声明了一个值，也声明了一种类型，你可以把Man赋值给一个变量，所以class是一种值，也可以说imgss是一个Man(类型)，此时Man承担了一种类型的角色。
interface声明了一种类型，但是你不能把dogfood赋值给某个变量，否则你会得到一个报错``dogfood’ only refers to a type, but is being used as a value here`
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