note
TimToady
We see enough value in the constraint that, by default, Perl 6 will warn on namespace reentry. However, recognizing that reopening namespaces is useful, we'll make it really easy to suppress that warning by adding some trait to the declaration of the package or module or class to express the intent of reopening or redefining. "<tt>is also</tt>" and "<tt>is instead</tt>" might work.
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