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12345678 \RequirePackage{xkeyval}\def\@boolean{}\define@boolkey{xkvdop5.cls}[cls]{bool}{\edef\@boolean{#1, \@boolean}}\def\boolean{\ifclsbool true\else false\fi\ (\@boolean)}\ProcessOptionsX\LoadClass{article}
\RequirePackage{xkeyval}
\def\@boolean{}
\define@boolkey{xkvdop5.cls}[cls]{bool}{\edef\@boolean{#1, \@boolean}}
\def\boolean{\ifclsbool true\else false\fi\ (\@boolean)}
\ProcessOptionsX
\LoadClass{article}