DeprecatedObjectProxy transforms an object into a deprecated one. It takes an object, a deprecation message and optionally a deprecator. The deprecator defaults to +ActiveSupport::Deprecator+ if none is specified.
deprecated_object = ActiveSupport::Deprecation::DeprecatedObjectProxy.new(Object.new, "This object is now deprecated") # => #<Object:0x007fb9b34c34b0> deprecated_object.to_s DEPRECATION WARNING: This object is now deprecated. (Backtrace) # => "#<Object:0x007fb9b34c34b0>"