GSON 2.2.2 can not serialize the type “? extend someInterface”

GSON 2.2.2 can not serialize the type "? extend someInterface"



1.Gson (Gson 2.2.4 API) - Google Code

Description:public final class Gson extends Object. This is the main class
for using Gson. Gson is typically used by first constructing a Gson
instance and then invoking toJson ...



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