BooleanExpr
A subtype of Expression that represents a condition with a boolean value, such as would be used for filtering items. This is a marker interface which adds no additional declarations.
Inheritors
Inherited functions
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Accepts a visitor that is traversing an expression tree by dispatching to a subtype implementation. Subtype implementations MUST call the ExpressionVisitor.visit overload for their concrete type (effectively forming a double dispatch) and MUST return the resulting value.