Parameter marked with @Body in Retrofit methods fully replace other parameters marked with @Field.

[Ridje]

Hello there.

Description
I have a situation where I need to use both @Body and @field together. However, in my specific case, parameters marked with @field are not used in the generated file. Am I doing something wrong ideologically, or should I use another approach?

Code

  @POST('%{someexample}')
  @FormUrlEncoded()
  Future<String> getMyEndpoint({
    @Field("SERVICE_CODE") required String serviceCode,
    @Body() required Map<String, String> parameters,
    @Field("ACTION") String action = "ONLINE_CHECK",
  });

Expected request body
Data: {
"SERVICE_CODE: "myCode",
"ACTION": "ONLINE_CHECK",
"BODY_PARAM_1": "123",
"BODY_PARAM_2": "321",
}

Actual request body
Data: {
"BODY_PARAM_1": "123",
"BODY_PARAM_2": "321",
}