def unselect(option)
if node['multiple'] != 'multiple'
raise Capybara::UnselectNotAllowed, "Cannot unselect option '#{option}' from single select box."
end
begin
option_node = node.find_element(:xpath, ".//option[normalize-space(text())=#{Capybara::XPath.escape(option)}]") || node.find_element(:xpath, ".//option[contains(.,#{Capybara::XPath.escape(option)})]")
option_node.clear
rescue
options = node.find_elements(:xpath, "//option").map { |o| "'#{o.text}'" }.join(', ')
raise Capybara::OptionNotFound, "No such option '#{option}' in this select box. Available options: #{options}"
end
end