use crate::*;
use indexmap::IndexMap;

/// A map of possible out-of band callbacks related to the parent operation.
/// Each value in the map is a Path Item Object that describes a set of
/// requests that may be initiated by the API provider and the expected responses.
/// The key value used to identify the callback object is an expression,
/// evaluated at runtime, that identifies a URL to use for the callback operation.
pub type Callback = IndexMap<String, PathItem>;