Remove unused and never defined 'node' attribute in pubsub#event item schema. This had been added in version 1.8 of the JEP, but never used.
+Add a new sentence and example about what to do if there are fewer items than requested present in a node.
Remove unused and never defined 'node' attribute in pubsub#event item schema. This had been added in version 1.8 of the JEP, but never used.
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