src/linkProcessors/nextEnvProcessor.js
function passChains (first, last, sequence) {
    return sequence.map(function (el) {
      return el._id;
    }).slice(first, last + 1);
  }
function passChains (first, last, sequence) {
    return sequence.map(function (el) {
      return el._id;
    }).slice(first, last + 1);
  }
function passChains ( first , last , sequence ) { return sequence . map ( function ( el ) { return el . _id ; } ) . slice ( first , last + 1 ) ; }
Return filtered list for passing functions
@param   {Number}    first
@param   {Number}    last
@return  {Array}
Return filtered list for passing functions