code: function compileCss(src, dest) {
    gulp
      .src(src)
      .pipe(plumber(config.plumberOptions))
      .pipe(gulpif(!config.production, sourcemaps.init()))
      .pipe(sass({
        outputStyle: config.production ? 'compressed' : 'expanded',
        precision: 5
      }))
      .pipe(postcss(processors))
      .pipe(gulpif(config.production, rename({
        suffix: '.min',
        extname: '.css'
      })))
      .pipe(gulpif(!config.production, sourcemaps.write()))
      .pipe(gulp.dest(dest));
  }
docs: Default CSS compilation function.
  
  @param {String} src
  @param {String} dest