name : assign-layer-names.js "use strict" module.exports = function (layer, node, state, options) { layer.forEach((layerPart, i) => { if (layerPart.trim() === "") { if (options.nameLayer) { layer[i] = options .nameLayer(state.anonymousLayerCounter++, state.rootFilename) .toString() } else { throw node.error( `When using anonymous layers in @import you must also set the "nameLayer" plugin option` ) } } }) }