docs: func (c *Glacier) PurchaseProvisionedCapacityRequest(input *PurchaseProvisionedCapacityInput) (req *request.Request, output *PurchaseProvisionedCapacityOutput) {
  	op := &request.Operation{
  		Name:       opPurchaseProvisionedCapacity,
  		HTTPMethod: "POST",
  		HTTPPath:   "/{accountId}/provisioned-capacity",
  	}
  
  	if input == nil {
  		input = &PurchaseProvisionedCapacityInput{}
  	}
  
  	output = &PurchaseProvisionedCapacityOutput{}
  	req = c.newRequest(op, input, output)
  	return
  }