Mailspring/internal_packages/preferences/lib/main.jsx

import {PreferencesUIStore,
  WorkspaceStore,
  ComponentRegistry} from 'nylas-exports';

import PreferencesRoot from './preferences-root';
import PreferencesGeneral from './tabs/preferences-general';
import PreferencesAccounts from './tabs/preferences-accounts';
import PreferencesAppearance from './tabs/preferences-appearance';
import PreferencesKeymaps from './tabs/preferences-keymaps';
// import PreferencesMailRules from './tabs/preferences-mail-rules';
import PreferencesIdentity from './tabs/preferences-identity';

export function activate() {
  PreferencesUIStore.registerPreferencesTab(new PreferencesUIStore.TabItem({
    tabId: 'General',
    displayName: 'General',
    component: PreferencesGeneral,
    order: 1,
  }))
  PreferencesUIStore.registerPreferencesTab(new PreferencesUIStore.TabItem({
    tabId: 'Accounts',
    displayName: 'Accounts',
    component: PreferencesAccounts,
    order: 2,
  }))
  PreferencesUIStore.registerPreferencesTab(new PreferencesUIStore.TabItem({
    tabId: 'Subscription',
    displayName: 'Subscription',
    component: PreferencesIdentity,
    order: 3,
  }))
  PreferencesUIStore.registerPreferencesTab(new PreferencesUIStore.TabItem({
    tabId: 'Appearance',
    displayName: 'Appearance',
    component: PreferencesAppearance,
    order: 4,
  }))
  PreferencesUIStore.registerPreferencesTab(new PreferencesUIStore.TabItem({
    tabId: 'Shortcuts',
    displayName: 'Shortcuts',
    component: PreferencesKeymaps,
    order: 5,
  }))
  // PreferencesUIStore.registerPreferencesTab(new PreferencesUIStore.TabItem({
  //   tabId: 'Mail Rules',
  //   displayName: 'Mail Rules',
  //   component: PreferencesMailRules,
  //   order: 6,
  // }))

  WorkspaceStore.defineSheet('Preferences', {}, {
    split: ['Preferences'],
    list: ['Preferences'],
  });

  ComponentRegistry.register(PreferencesRoot, {
    location: WorkspaceStore.Location.Preferences,
  });
}

export function deactivate() {
}

export function serialize() {
  return this.state;
}