def field(display, pattern, opts = {}, &block)
      actions << lambda {
        action_for(:field, {display: display, pattern: pattern}, opts, &block)
      }
    end
def field(display, pattern, opts = {}, &block)
      actions << lambda {
        action_for(:field, {display: display, pattern: pattern}, opts, &block)
      }
    end
Get a field on current page.

 @param display [String] display name