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CQL::BooleanNode - represents a boolean node in a CQL parse tree
Base class for boolean nodes in a CQL parse tree. See CQL::AndNode and CQL::OrNode. CQL::BooleanNode inherits from CQL::Node. Typically you'll want to use CQL::AndNode or CQL::OrNode to instantiate the object.
You must pass in both a left and right parameter, which should be CQL::Node objects.