Retrofit ignores a moshi JsonAdapter

[oleginvoke]

Retrofit
            .Builder()
            .baseUrl(ImageSearchApi.BASE_URL)
            .addConverterFactory(
                MoshiConverterFactory.create(
                    Moshi.Builder()
                        .add(SearchFilter::class.java, SearchFilterJsonAdapter())
                        .build()
                ))
            .build()
            .create()

@Query("tbs")
filter: SearchFilter?

Retrofit ignores a moshi JsonAdapter, it's not calling toJson() for the query param