code: function parseBody(fn){
    //get arguments to function as array of strings
    var body=fn.body=fn.body||      //cache result in `body` property of function
        fn.toString()               //get string version of function
        .replace(/\/\/.*$|\/\*[\s\S]*?\*\//mg, '')   //strip comments
        .replace(/^\s*$/mg, '')     // kill empty lines
        .replace(/^.*?\)\s*\{\s*(return)?\s*/, '') // kill argument list and leading curly
        .replace(/\s*\}\s*$/, '')   // kill trailing curly
    ;
    return body; // or fn?
  }
docs: Return function body.