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The stream module of Kafka has a window state store that stores the aggregated values for a key in a given time frame. The window store is implemented as an interface, this interface has a strange method named put(key, value), this method has does not have a timestamp as a parameter which is important to determine that to which window frame does the key belongs. In this method, the current record timestamp is used for determining the window frame(as specified in the description of the method), this constraint makes WindowStore error prone. It is also specified in the method description that method with a timestamp parameter should be used which already present in the interface which expects key, value, and start timestamp as well of the window to which the key belongs.  Therefore Therefore by deprecating (and finally removing) the method put(key, value), we can prevent inconsistency.

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