How to use

writeMap

method

in

com.apollographql.apollo.internal.json.InputFieldJsonWriter

@SuppressWarnings("unchecked")
@Override public void writeCustom(@NotNull String fieldName, ScalarType scalarType, Object value) throws IOException {
 checkNotNull(fieldName, "fieldName == null");
 if (value != null) {
  CustomTypeAdapter customTypeAdapter = scalarTypeAdapters.adapterFor(scalarType);
  CustomTypeValue customTypeValue = customTypeAdapter.encode(value);
  if (customTypeValue instanceof CustomTypeValue.GraphQLString) {
   writeString(fieldName, ((CustomTypeValue.GraphQLString) customTypeValue).value);
  } else if (customTypeValue instanceof CustomTypeValue.GraphQLBoolean) {
   writeBoolean(fieldName, ((CustomTypeValue.GraphQLBoolean) customTypeValue).value);
  } else if (customTypeValue instanceof CustomTypeValue.GraphQLNumber) {
   writeNumber(fieldName, ((CustomTypeValue.GraphQLNumber) customTypeValue).value);
  } else if (customTypeValue instanceof CustomTypeValue.GraphQLJsonString) {
   writeString(fieldName, ((CustomTypeValue.GraphQLJsonString) customTypeValue).value);
  } else if (customTypeValue instanceof CustomTypeValue.GraphQLJson) {
   writeMap(fieldName, ((CustomTypeValue.GraphQLJson) customTypeValue).value);
  } else {
   throw new IllegalArgumentException("Unsupported custom value type: " + customTypeValue);
  }
 } else {
  jsonWriter.name(fieldName).nullValue();
 }
}