Expose peek method to handle reading object fields that may be null, similar to GSON.
Expose peek method to handle reading object fields that may be null, similar to GSON.

https://google-gson.googlecode.com/svn/trunk/gson/docs/javadocs/com/google/gson/stream/JsonReader.html

coraldane/fastjson,coraldane/fastjson,coraldane/fastjson