Function use

_benchmarks/sample_echarts.js:31726–31748

(ext)

      }
    };
    function use(ext) {
      if (isArray(ext)) {
        // use([ChartLine, ChartBar]);
        each(ext, function (singleExt) {
          use(singleExt);
        });
        return;
      }

      if (indexOf(extensions, ext) >= 0) {
        return;
      }

      extensions.push(ext);

      if (isFunction(ext)) {
        ext = {
          install: ext
        };
      }

      ext.install(extensionRegisters);
    }

    /*
    * Licensed to the Apache Software Foundation (ASF) under one