sdk/src/com/socialize/google/gson/TypeAdapter.java
public final String toJson(T value) throws IOException {
    StringWriter stringWriter = new StringWriter();
    toJson(stringWriter, value);
    return stringWriter.toString();
  }
public final String toJson(T value) throws IOException {
    StringWriter stringWriter = new StringWriter();
    toJson(stringWriter, value);
    return stringWriter.toString();
  }
Converts {@code value} to a JSON document. Unlike Gson's similar {@link
Gson#toJson(Object) toJson} method, this write is strict. Create a {@link
JsonWriter#setLenient(boolean) lenient} {@code JsonWriter} and call
{@link #write(com.socialize.google.gson.stream.JsonWriter, Object)} for lenient
writing.

@param value the Java object to convert. May be null.
@since 2.2