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class Module
# Encapsulates the common pattern of:
#
# alias_method :foo_without_feature, :foo
# alias_method :foo, :foo_with_feature
#
# With this, you simply do:
#
# alias_method_chain :foo, :feature
#
# And both aliases are set up for you.
def alias_method_chain(target, feature)
alias_method "#{target}_without_#{feature}", target
alias_method target, "#{target}_with_#{feature}"
end
end
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