code: public static AssignedAddOnCreator creator(final String pathAccountSid, 
                                                 final String pathResourceSid, 
                                                 final String installedAddOnSid) {
          return new AssignedAddOnCreator(pathAccountSid, pathResourceSid, installedAddOnSid);
      }
docs: Create a AssignedAddOnCreator to execute create.
  
  @param pathAccountSid The SID of the Account that will create the resource
  @param pathResourceSid The SID of the Phone Number to assign the Add-on
  @param installedAddOnSid The SID that identifies the Add-on installation
  @return AssignedAddOnCreator capable of executing the create