toJsonString

@JvmName(name = "-toJson")
fun <T> Adapter<T>.toJsonString(    value: T,     customScalarAdapters: CustomScalarAdapters = CustomScalarAdapters.Empty,     indent: String? = null): String
fun Operation.Data.toJsonString(customScalarAdapters: CustomScalarAdapters = CustomScalarAdapters.Empty, indent: String? = null): String