addCoins

open fun addCoins(index: Int, value: Token): Binance.SendOrder.Input.Builder
open fun addCoins(builderForValue: Builder): Binance.SendOrder.Input.Builder
open fun addCoins(index: Int, builderForValue: Builder): Binance.SendOrder.Input.Builder
input coin amounts
repeated .TW.Binance.Proto.SendOrder.Token coins = 2;