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tree)
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module Arel
class TreeManager
# FIXME: Remove this.
include Arel::Relation
def initialize engine
@engine = engine
end
def to_dot
Visitors::Dot.new.accept @head
end
def to_sql
viz = Visitors::ToSql.new @engine
viz.accept @head
end
def initialize_copy other
super
@head = @head.clone
end
end
end
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