angular - Angular2 How can i Use One Component function In Another Component -


here have 2 component cacadingcomponent , logincomponent want consume cacadingcomponent function in logincomponent

cacadingcomponent 

export class cascadingcomponent {    countrylist: country[];    constructor(private _cacadeservice: cascadindservice) {           }     getcountry() {         return this._cacadeservice.getcountrylist().subscribe((data) => this.countrylist = data);     }

logincomponent.ts

here want call getcountry() function in logincomponent

export class logincomponent{ //here how can call } 

    export class logincomponent implements oninit{     @viewchild(cascadingcomponent) cascadingcomponent: cascadingcomponent ;     ngoninit(){     this.cascading.getcountry();} }

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