code: func (r Billing_Currency_ExchangeRate) GetPrice(price *datatypes.Float64, formatOptions *datatypes.Container_Billing_Currency_Format) (resp string, err error) {
  	params := []interface{}{
  		price,
  		formatOptions,
  	}
  	err = r.Session.DoRequest("SoftLayer_Billing_Currency_ExchangeRate", "getPrice", params, &r.Options, &resp)
  	return
  }
docs: // no documentation yet