docs: public ListEmailIdentitiesResult withEmailIdentities(IdentityInfo... emailIdentities) {
          if (this.emailIdentities == null) {
              setEmailIdentities(new java.util.ArrayList<IdentityInfo>(emailIdentities.length));
          }
          for (IdentityInfo ele : emailIdentities) {
              this.emailIdentities.add(ele);
          }
          return this;
      }