/// A trait for elements that can be toggled.////// Implement this for elements that are visually distinct/// when in two opposing states, like checkboxes or switches.pub trait Toggleable {    /// Sets whether the element is selected.    fn toggle_state(self, selected: bool) -> Self;} /// Represents the selection status of an element.#[derive(Debug, Default, PartialEq, Eq, Hash, Clone, Copy)]pub enum ToggleState {    /// The element is not selected.    #[default]    Unselected,    /// The selection state of the element is indeterminate.    Indeterminate,    /// The element is selected.    Selected,} impl ToggleState {    /// Returns the inverse of the current selection status.    ///    /// Indeterminate states become selected if inverted.    pub fn inverse(&self) -> Self {        match self {            Self::Unselected | Self::Indeterminate => Self::Selected,            Self::Selected => Self::Unselected,        }    }} impl From<bool> for ToggleState {    fn from(selected: bool) -> Self {        if selected {            Self::Selected        } else {            Self::Unselected        }    }} impl From<Option<bool>> for ToggleState {    fn from(selected: Option<bool>) -> Self {        match selected {            Some(true) => Self::Selected,            Some(false) => Self::Unselected,            None => Self::Unselected,        }    }}