code: function getNpmPath() {
      if (!_npmPath) {
          try {
              if (os.platform() === 'win32') {
                  // We're on Windows
                  const whereOutput = childProcess.execSync('where npm', { stdio: [] }).toString();
                  const lines = whereOutput.split(os.EOL).filter((line) => !!line);
                  // take the last result, we are looking for a .cmd command
                  // see https://github.com/Microsoft/web-build-tools/issues/759
                  _npmPath = lines[lines.length - 1];
              }
              else {
                  // We aren't on Windows - assume we're on *NIX or Darwin
                  _npmPath = childProcess.execSync('which npm', { stdio: [] }).toString();
              }
          }
          catch (e) {
              throw new Error(`Unable to determine the path to the NPM tool: ${e}`);
          }
          _npmPath = _npmPath.trim();
          if (!fs.existsSync(_npmPath)) {
              throw new Error('The NPM executable does not exist');
          }
      }
      return _npmPath;
  }
docs: Get the absolute path to the npm executable