engine

type Engine interface {
	// Meta will extract meta information from a template
	Meta(tpl *types.Template) (map[string]interface{}, error)

	ExportAccounts(writer io.Writer, tpl *types.Template, accounts []*types.Account) error
	ExportClients(writer io.Writer, tpl *types.Template, clients []*types.Client) error
	ExportProjects(writer io.Writer, tpl *types.Template, projects []*types.Project) error
	ExportInvoices(writer io.Writer, tpl *types.Template, invoices []*types.Invoice, account *types.Account) error
}