package com.pengrad.telegrambot.model.request;

import com.google.gson.Gson;

/**
 * stas
 * 8/11/15
 */
public abstract class Keyboard {

    @Override
    public final String toString() {
        return new Gson().toJson(this);
    }

}

@@ -132,16 +132,53 @@
 oard %7B%0A%0A
+    private Gson gson = new Gson();%0A%0A
     @Ove
@@ -235,26 +235,20 @@
  return 
-new G
+g
 son
-()
 .toJson(

Use one Gson instance in Keyboard