get applicationKeyMap() {
    return [this.globalEventStrategy, this.focusOnlyEventStrategy].reduce((memo, strategy) => {
      const builder = new ApplicationKeyMapBuilder(strategy.componentTree);
      const keyMap = builder.build();

      return { ...memo, ...keyMap };
    }, {});
  }
Returns a mapping of all of the application's actions and the key sequences
needed to trigger them.

@type {ApplicationKeyMap} The application's key map