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 ( METHODS_INHERITANCE . indexOf ( key ) !== - 1 ) { return <mask> ( objValue , wrap ( srcValue , wrapperFunction ) ) ; } if ( METHODS_MERGE_RESULT . indexOf ( key ) !== - 1 ) { return wrap ( objValue , wrap ( srcValue , wrapperMergeResult ) ) ; } if ( key === 'shouldComponentUpdate' ) { return wrap ( objValue , wrap ( srcValue , wrapperOrResult ) ) ; } if ( key === 'statics' ) { checkOverriddenMethods ( objValue , srcValue ) ; } if ( key === 'render' && objValue && srcValue ) { throw new Error ( 'The "render" method you can override' ) ; } if ( key === 'displayName' && objValue && srcValue ) { throw new Error ( 'The "displayName" property can not be redefined' ) ; } if ( isFunction ( objValue ) && isFunction ( srcValue ) ) { throw new Error ( ` ${ key } ` ) ; } }