public final void writeFloat(Float value) {
        if (value == null) {
            writeNumberNull();
        } else {
            writeDouble(value);
        }
    }
If ReferenceDetection has been set, returns the path of the current object, otherwise returns null
@since 2.0.51
@return the path of the current object
core/src/main/java/com/alibaba/fastjson2/JSONWriter.java