···

       
14
       
14
       
 
       
      configuration = mkOption {

     

       
15
       
15
       
 
       
        type = types.nullOr types.attrs;

     

       
16
       
16
       
 
       
        default = null;

     

       
17
       
17
       
-
       
        example = literalExample ''

     

       
17
       
17
       
+
       
        example = literalExpression ''

     

       
18
       
18
       
 
       
          {

     

       
19
       
19
       
 
       
            providers = {

     

       
20
       
20
       
 
       
              twilio = {