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The <AttributeFilterScript>
element contains a script (or a reference to a script) that ultimately applies an implementation of Predicate<Attribute>
to a given entity attribute. The containing filter implicitly iterates over all entity attributes in the metadata pipeline. For each entity attribute, the entity attribute is removed from the input stream if (and only if) the predicate evaluates to false.
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The following trivial implementation of Predicate<Attribute>
always returns false regardless of the input
argument:
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