nl_tokens: 过滤一些不需要的依赖，通常在 correctDependencies 之后处理
pl_tokens: function filterDependencies ( file , dependencies , filter ) { for ( var i = dependencies . length - 1 ; i >= 0 ; i -- ) { var dependency = dependencies [ i ] ; // 绝对路径不用处理 if ( isAbsolute ( dependency . raw ) || ( filter && <mask> ( file , dependency ) ) ) { dependencies . splice ( i , 1 ) ; } } }