A better way to write if..else block in typescript with network call in between

I find myself writing a lot of code like this;

if(cond){
   /*do some network call */
   this.networkService.invoke(params).subscribe((res) => {
      this.doSomething();
   })
}else{
   /* do something without calling the network */
   this.doSomething();
}

Essentially, this.doSomething(); has to be called whether the condition is met or not. If the cond === true, then do some network call, then this.doSomething(). Is there a better way to write such code?