Function expander 

pub fn expander<'a, H, C, Message, Theme, Renderer>(
    header: H,
    content: C,
    is_expanded: bool,
) -> Expander<'a, Message, Theme, Renderer>
where
    H: Into<Element<'a, Message, Theme, Renderer>>,
    C: Into<Element<'a, Message, Theme, Renderer>>,

Available on crate feature expander only.

Creates a new Expander from the provided header and content.

Example

enum Message {
    ExpanderPressed,
}

let mut expander = expander(
    button("Header").on_press(Message::ExpanderPressed),
    column!["Item 1", "Item 2", "Item 3"],
    self.is_expanded,
);