// Don't treat repeated occurrences separately.
_closure.put( found.name, found );
}
}
else if (_node instanceof ExpressionNodeForLet) {
final ExpressionNodeForLet let = (ExpressionNodeForLet) _node;
addToClosure( _closure, let.value() );
addToClosureWithInnerDefs( _closure, let.in(), let.varName() );
}
else if (_node instanceof ExpressionNodeForFoldDefinition) {
final ExpressionNodeForFoldDefinition fold = (ExpressionNodeForFoldDefinition) _node;