Angular2; Include the component module, not all components separately

Question

I would like to combine several components into a module ( Widget1Module), and then insert this module into another module ( AdminModule), giving all components AdminModuleaccess to the components in Widget1Module.

I want to do this in order to avoid an array declarationsin AdminModulefrom growing large and unmanaged, see below for a more detailed explanation of my problem.

I have a module file, for example:

import { CommonModule } from '@angular/common';
import { RoutingModule } from './admin-routing.module';

import { Declaration1 } from "./declaration1.component";
import { Declaration2 } from "./declaration2.component";
import { Declaration3 } from "./declaration3.component";

    @NgModule({
    imports: [
        CommonModule,
        RoutingModule,

    ],
    declarations: [
        Declaration1,
        Declaration2,
        Declaration3,
    ]
    })

export class AdminModule {}

I would like to create a component ( Widget1Component) that can be used inside any of the 'declaration' modules. I know I can do something like this:

import { CommonModule } from '@angular/common';
import { RoutingModule } from './admin-routing.module';

import { Declaration1 } from "./declaration1.component";
import { Declaration2 } from "./declaration2.component";
import { Declaration3 } from "./declaration3.component";

import { Widget1 } from "./widget1.component";

    @NgModule({
        imports: [
            CommonModule,
            RoutingModule,

        ],
        declarations: [
            Declaration1,
            Declaration2,
            Declaration3,
            Widget1
        ]
        })

    export class AdminModule {}

, , , , , :

import { CommonModule } from '@angular/common';
import { RoutingModule } from './admin-routing.module';

import { Declaration1 } from "./declaration1.component";
import { Declaration2 } from "./declaration2.component";
import { Declaration3 } from "./declaration3.component";

import { Widget1Module } from "./widget1.module";

    @NgModule({
        imports: [
            CommonModule,
            RoutingModule,
            Widget1Module
        ],
        declarations: [
            Declaration1,
            Declaration2,
            Declaration3
        ]
        })

    export class AdminModule {}

, - , , , Widget1Module.

Answer 1

Widget1Module , AdminModule, :

import { CommonModule } from '@angular/common';
import { Widget1Component } from "./widget1.component";

@NgModule({
    imports: [ CommonModule ],
    declarations: [ Widget1Component ],
    exports: [ Widget1Component ]
    })

export class Widget1Module {}

, Widget1Module AdminModule, Widget1Component .