pakmanaged.js
function isAbsolute(fp) {
      if (typeof fp !== 'string') {
        throw new TypeError('isAbsolute expects a string.');
      }
      if (!isWindows() && isAbsolute.posix(fp)) {
        return true;
      }
      return isAbsolute.win32(fp);
    }
function isAbsolute(fp) {
      if (typeof fp !== 'string') {
        throw new TypeError('isAbsolute expects a string.');
      }
      if (!isWindows() && isAbsolute.posix(fp)) {
        return true;
      }
      return isAbsolute.win32(fp);
    }
Returns true if a file path is absolute.

@param  {String} `fp`
@return {Boolean}