core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderMapMethod.java [46:61]:
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    protected void acceptAny(T object, Object fieldValue, long features) {
        if (arrayToMapKey != null && fieldValue instanceof Collection) {
            ObjectReader reader = this.getObjectReader(JSONFactory.createReadContext());
            Map map = (Map) reader.createInstance(features);
            arrayToMap(map,
                    (Collection) fieldValue,
                    arrayToMapKey,
                    namingStrategy,
                    JSONFactory.getObjectReader(valueType, this.features | features),
                    arrayToMapDuplicateHandler);
            accept(object, map);
            return;
        }

        super.acceptAny(object, fieldValue, features);
    }
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core/src/main/java/com/alibaba/fastjson2/reader/FieldReaderMapField.java [44:59]:
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    protected void acceptAny(T object, Object fieldValue, long features) {
        if (arrayToMapKey != null && fieldValue instanceof Collection) {
            ObjectReader reader = this.getObjectReader(JSONFactory.createReadContext());
            Map map = (Map) reader.createInstance(features);
            arrayToMap(map,
                    (Collection) fieldValue,
                    arrayToMapKey,
                    namingStrategy,
                    JSONFactory.getObjectReader(valueType, this.features | features),
                    arrayToMapDuplicateHandler);
            accept(object, map);
            return;
        }

        super.acceptAny(object, fieldValue, features);
    }
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