Some docs and import optimization

Author: Ben Grynhaus

libs/core/src/lib/declarations/omit.d.ts

@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-import { KnownKeys } from './known-keys';
-
+/**
+ * Inverse of `Pick<T, K>`.
+ */
 export type Omit<T, K extends keyof T> = Pick<T, Exclude<KnownKeys<T> & keyof T, K>>;

libs/core/src/lib/declarations/string-map.d.ts

@@ -1,4 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+/**
+ * An object with a `string`-based index signature.
+ */
 export type StringMap<T = any> = { [index: string]: T };

libs/fabric/src/lib/components/command-bar/directives/command-bar-items.directives.ts

@@ -2,17 +2,17 @@
 // Licensed under the MIT License.
 
 import {
-  Directive,
+  AfterContentInit,
   ContentChildren,
-  QueryList,
+  Directive,
+  EventEmitter,
   OnDestroy,
-  AfterContentInit,
   Output,
-  EventEmitter,
+  QueryList,
 } from '@angular/core';
-import { ICommandBarItemOptions } from '../command-bar.component';
 import { Subscription } from 'rxjs';
-import { CommandBarItemDirective, CommandBarItemChangedPayload } from './command-bar-item.directives';
+import { ICommandBarItemOptions } from '../command-bar.component';
+import { CommandBarItemChangedPayload, CommandBarItemDirective } from './command-bar-item.directives';
 
 export abstract class CommandBarItemsDirectiveBase implements AfterContentInit, OnDestroy {
   private readonly _subscriptions: Subscription[] = [];