$prefix = $module->getModulePrefix();
if ( isset( $prefixes[$prefix] ) ) {
$this->fail( "Module prefix '{$prefix}' is shared between {$class} and {$prefixes[$prefix]}" );
$prefix = $module->getModulePrefix();
if ( isset( $prefixes[$prefix] ) ) {
$this->fail( "Module prefix '{$prefix}' is shared between {$class} and {$prefixes[$prefix]}" );