code: function chainHelp(chain) {
    return chain.validators.map(function(e) {
                                  return e.help;
                                })
                           .filter(function(e) {
                                  return e;
                                });
  }
docs: Returns an array of documentation strings for each validator in a chain.
  
  @private
  @param {Chain} chain The validator chain.
  @return {Array} An array of documentation strings.