bless - create an object
This function tells the referenced object (passed as REF) that it is now
an object in the CLASSNAME package--or the current package if no CLASSNAME
is specified, which is often the case. It returns the reference for
convenience, since a
is often the last thing in a constructor.
Always use the two-argument version if the function doing the blessing
might be inherited by a derived class. See
the perlobj manpage
for more about the
blessing (and blessings) of objects.