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require 'active_support/core_ext/object/blank'
class Object
def extended_by #:nodoc:
ancestors = class << self; ancestors end
ancestors.select { |mod| mod.class == Module } - [ Object, Kernel ]
end
def extend_with_included_modules_from(object) #:nodoc:
object.extended_by.each { |mod| extend mod }
end
end
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