title: this `implicitly` has type any it does not have type annotation?
body: <p>i am calling function <code>this.buildSingleRequestBody</code> it is throwing error this implicilty has type any it does not have type annotation , not sure what has implemented wrong.</p>
  
  <p>main.ts</p>
  
  <pre><code> private  buildRequestArray(specialtyMembers: ISpecialtyInfoObj[],
                                 request: ICombinedAccountBalanceRequest): IRequestURL[] {
          const specialtyUrl = urlConfig.specialtyBaseUrl + "payments/getAccountBalance";
  
          const serviceContext = request.header.serviceContext;
          const requestArray: IRequestURL[] = specialtyMembers.map(function(member) {
              const body: any = this.buildSingleRequestBody(member, serviceContext);
              return {url: specialtyUrl, body};
          });
  
          return requestArray;
      }
  
  
     private buildSingleRequestBody(specialtyMember: ISpecialtyInfoObj, serviceContext: IServiceContext) {
          return {
              "header": {
                  serviceContext
              },
              "specialtyId": specialtyMember.Id || "78988716",
              "specialtySource": specialtyMember.specialtySource || "HBS"
          };
      }
  </code></pre>