How to use the framework/events.Events.emit function in framework

this.selectEntryView.on('show-open-files', () => {
            this.selectEntryView.hide();
            Events.emit('open-file');
        });
    },

setFilter(filter) {
        this.filter = this.prepareFilter(filter);
        this.filter.subGroups = this.settings.expandGroups;
        if (!this.filter.advanced && this.advancedSearch) {
            this.filter.advanced = this.advancedSearch;
        }
        const entries = this.getEntries();
        if (!this.activeEntryId || !entries.get(this.activeEntryId)) {
            const firstEntry = entries[0];
            this.activeEntryId = firstEntry ? firstEntry.id : null;
        }
        Events.emit('filter', { filter: this.filter, sort: this.sort, entries });
        Events.emit('entry-selected', entries.get(this.activeEntryId));
    }

windowResize() {
        Events.emit('page-geometry', { source: 'window' });
    }

Events.on('launcher-minimize', () => setTimeout(() => Events.emit('app-minimized'), 0));
Events.on('launcher-started-minimized', () => setTimeout(() => Launcher.minimizeApp(), 0));

toggleHelp() {
        Events.emit('toggle-settings', 'help');
    }

removeKeyFile() {
        this.db.credentials.keyFileHash = null;
        const changed = !!this.oldKeyFileHash;
        if (!changed && this.db.credentials.passwordHash === this.oldPasswordHash) {
            this.db.meta.keyChanged = this.oldKeyChangeDate;
        }
        this.set({ keyFileName: '', keyFilePath: '', keyFileChanged: changed });
        Events.emit('unset-keyfile', this.id);
        this.setModified();
    }

        file.on('change', () => Events.emit('file-changed', file));
        return true;

returnToApp() {
        Events.emit('edit-group');
    }
}

autoType() {
        Events.emit('auto-type', { entry: this.model });
    }