添加注释

app/src/main/java/com/sw/dualscreen/utils/SPUtil.kt

@@ -1,4 +1,4 @@
-package com.sw.inbound.utils
+package com.sw.dualscreen.utils
 
 import android.content.Context
 import androidx.core.content.edit
@@ -9,6 +9,9 @@ import kotlinx.coroutines.flow.map
 import kotlin.properties.ReadWriteProperty
 import kotlin.reflect.KProperty
 
+/**
+ * 持久化工具
+ */
 class SPUtil private constructor(context: Context, private val spName: String) {
 
     companion object {