code: function find(kernelName) {
    return jp.dataDirs({ withSysPrefix: true }).then(dirs => {
  
      const kernelInfos = dirs.map(dir => ({
        name: kernelName,
        resourceDir: path.join(dir, 'kernels', kernelName),
      }))
  
      return extractKernelResources(kernelInfos);
    }).then(kernelResource => kernelResource[kernelName])
  }
docs: find a kernel by name
  @param  {string} kernelName the kernel to locate
  @return {Object} kernelResource object