pub fn categories(mut self, input: crate::model::Category) -> Self {
            let mut v = self.categories.unwrap_or_default();
            v.push(input);
            self.categories = Some(v);
            self
        }
/// Appends an item to `categories`.
///
/// To override the contents of this collection use [`set_categories`](Self::set_categories).
///
/// <p>A list of categories that describe the type of support issue a case describes. Categories consist of a category name and a category code. Category names and codes are passed to Amazon Web Services Support when you call <code>CreateCase</code>.</p>
Appends an item to `categories`.
To override the contents of this collection use [`set_categories`](Self::set_categories).

A list of categories that describe the type of support issue a case describes. Categories consist of a category name and a category code. Category names and codes are passed to Amazon Web Services Support when you call CreateCase.
Appends an item to ` categories ` . To override the contents of this collection use [ ` set_categories ` ] ( Self :: set_categories ) . A list of categories that describe the type of support issue a case describes . Categories consist of a category name and a category code . Category names and codes are passed to Amazon Web Services Support when you call CreateCase .
pub fn categories(mut self, input: crate::model::Category) -> Self {
            let mut v = self.categories.unwrap_or_default();
            v.push(input);
            self.categories = Some(v);
            self
        }
pub fn categories ( mut self , input : crate :: model :: Category ) -> Self { let mut v = self . categories . unwrap_or_default ( ) ; v . push ( input ) ; self . categories = Some ( v ) ; self }
Appends an item to `categories`.
Appends an item to ` categories ` .
mut self
input
crate::model::Category
mut self
input
crate::model::Category