It was done as part of the 6.x series, and will be available in 6.0.final next week:
On 20 Nov 2013, at 02:00, profversaggi <email@example.com> wrote:
> Greetings everyone,
> I recall having a conversation long ago where it was articulated that the
> lazy Rete might be soon to be working, which merges the benefits of Rete and
> Leaps for deployment on the mobile platform.
> Has there been any progress on that front?
> View this message in context: http://drools.46999.n3.nabble.com/Drools-5-4-0-Final-released-tp3986544p4026836.html
> Sent from the Drools: Developer (committer) mailing list mailing list archive at Nabble.com.
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