Hashmap in Config unnecessary?

[Wuketuke]

why does Config use a hashmap for the different modes? Since Mode is an enum with 3 variants, a [KeyTrie; 3] might be better.
(or a struct that wraps said array)

#[derive(Debug, Clone, PartialEq)]
pub struct Config {
    pub theme: Option<theme::Config>,
    pub keys: HashMap<Mode, KeyTrie>, // why use a hashmap?
    pub editor: helix_view::editor::Config,
}

heres the Mode enum

#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum Mode {
    Normal = 0,
    Select = 1,
    Insert = 2,
}