Does Perl's OO have "private method" like Python and other OO languages?
When we say "sub foo { }" in a package 'bar',Perl will insert the "foo" into
this package's symbol table,so we can access foo() from anywhere out of the
package bar,via the form of "bar::foo()".
So I don't think Perl has its private method.Or we can make a private method by
declaring an anonymous subroutine of "sub { }".Am I right?
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