<s>
In	O
computer	B-General_Concept
programming	I-General_Concept
,	O
a	O
mirror	O
is	O
a	O
reflection	B-Language
mechanism	O
that	O
is	O
completely	O
decoupled	O
from	O
the	O
object	O
whose	O
structure	O
is	O
being	O
introspected	O
.	O
</s>
<s>
This	O
is	O
as	O
opposed	O
to	O
traditional	O
reflection	B-Language
,	O
for	O
example	O
in	O
Java	B-Language
,	O
where	O
one	O
introspects	O
an	O
object	O
using	O
methods	O
from	O
the	O
object	O
itself	O
(	O
e.g.	O
</s>
<s>
Decoupling	O
the	O
reflection	B-Language
mechanism	O
from	O
the	O
objects	O
themselves	O
allows	O
for	O
a	O
few	O
benefits	O
:	O
</s>
<s>
The	O
object	O
's	O
interface	O
is	O
not	O
polluted	O
,	O
so	O
there	O
is	O
no	O
danger	O
of	O
breaking	O
reflection	B-Language
by	O
overriding	B-Language
a	O
reflective	O
method	O
.	O
</s>
<s>
Dart	B-Language
,	O
via	O
its	O
reflect	O
function	O
.	O
</s>
<s>
Rubinius	B-Application
(	O
Ruby	B-Language
implementation	O
)	O
,	O
via	O
its	O
Rubinius::Mirror.reflect	O
method	O
.	O
</s>
<s>
Swift	B-Application
,	O
via	O
its	O
reflect	O
function	O
.	O
</s>
