Moshi - modern JSON library for Android and Java. It makes it easy to parse JSON into Java objects.
ProGuard rules for Moshi
By default ProGuard removes unused classes, attributes, fields and methods. ProGuard obfuscates classes, fields, and methods with short names. Add the next rules in your configuration file to fix errors.
-dontwarn okio.** -dontwarn javax.annotation.Nullable -dontwarn javax.annotation.ParametersAreNonnullByDefault
For more information about Moshi please see the website.