Unclear about type assertion in pointer example

README

@@ -61,13 +61,13 @@ Usage:
     c.Set("foo", foo, 0)
     ...
     x, _ := c.Get("foo")
-    foo := x.(MyStruct)
+    foo := x.(*MyStruct)
     fmt.Println(foo.Num)
     ...
     foo.Num++
     ...
     x, _ := c.Get("foo")
-    foo := x.(MyStruct)
+    foo := x.(*MyStruct)
     foo.Println(foo.Num)
 
     // will print:

cache.go

@@ -72,13 +72,13 @@ import (
 //     c.Set("foo", foo, 0)
 //     ...
 //     x, _ := c.Get("foo")
-//     foo := x.(MyStruct)
+//     foo := x.(*MyStruct)
 //     fmt.Println(foo.Num)
 //     ...
 //     foo.Num++
 //     ...
 //     x, _ := c.Get("foo")
-//     foo := x.(MyStruct)
+//     foo := x.(*MyStruct)
 //     foo.Println(foo.Num)
 //
 // will print: