lib/utils/sourceMap.js
function emptySources(map) {
  return !map.sources ||
    !map.sources.length ||
    !map.sourcesContent ||
    !map.sourcesContent.length ||
    map.sources.length != map.sourcesContent.length;
}
function emptySources(map) {
  return !map.sources ||
    !map.sources.length ||
    !map.sourcesContent ||
    !map.sourcesContent.length ||
    map.sources.length != map.sourcesContent.length;
}
function emptySources ( map ) { return ! map . sources || ! map . sources . length || ! map . sourcesContent || ! map . sourcesContent . length || map . sources . length != map . sourcesContent . length ; }
Determine if 'map' has empty sources
@param {Object} map
@returns {Boolean}
Determine if map has empty sources