nl_tokens: Special handler of merge . Arrays are merged by the concatenation .
pl_tokens: function mergeCustomizer ( objValue , srcValue , key ) { if ( isArray ( objValue ) ) { return objValue . concat ( srcValue ) ; } if ( <mask> === 'lifecycle' ) { return mergeWith ( objValue , srcValue , lifecycleCustomizer ) ; } if ( key === 'events' ) { return mergeWith ( objValue , srcValue , eventsCustomizer ) ; } if ( key === 'accessors' ) { return mergeWith ( objValue , srcValue , accessorsCustomizer ) ; } if ( key === 'methods' ) { checkOverriddenMethods ( objValue , srcValue ) ; } }