# perl -e 'use My::Module::Account qw(_GenerateAccountSummary); _GenerateAccountSummary();'
Undefined subroutine &main::_GenerateAccountSummary called at -e line 1.
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perl -wle'use My::Module::Account qw(_GenerateAccountSummary); print My::Module::Account->can("import") || "no"'
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perl -wle'use My::Module::Account qw(_GenerateAccountSummary); print *{$::{_GenerateAccountSummary}}{CODE} || "no"'
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perl -wle'use My::Module::Account qw(_GenerateAccountSummary); print defined(&_GenerateAccountSummary) ? "yes" : "no"'