code: function processResult(loaderContext, resultPromise) {
    const { callback } = loaderContext;
  
    resultPromise
      .then(
        ({ css, map, imports }) => {
          imports.forEach(loaderContext.addDependency, loaderContext);
          return {
            // Removing the sourceMappingURL comment.
            // See removeSourceMappingUrl.js for the reasoning behind this.
            css: removeSourceMappingUrl(css),
            map: typeof map === 'string' ? JSON.parse(map) : map,
          };
        },
        (lessError) => {
          if (lessError.filename) {
            loaderContext.addDependency(lessError.filename);
          }
          throw formatLessError(lessError);
        }
      )
      .then(({ css, map }) => {
        callback(null, css, map);
      }, callback);
  }
docs: Removes the sourceMappingURL from the generated CSS, parses the source map and calls the next loader.
  
  @param {loaderContext} loaderContext
  @param {Promise<LessResult>} resultPromise