The flare.vis.operator.filter package provides classes for visually filtering items by setting their visibility.

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	Class	Description
	FisheyeTreeFilter	Filter operator that computes a fisheye degree-of-interest function over a tree structure.
	GraphDistanceFilter	Filter operator that sets visible all items within a specified graph distance from a set of focus nodes.
	VisibilityFilter	Filter operator that sets item visibility based on a filtering condition.