webform source

gistfile1.txt

your_details:
  '#type': fieldset
  '#title': 'Your Details'
application_type:
  '#type': fieldset
  '#title': Type
  choose_one_option:
    '#type': radios
    '#title': 'Please select an Application Type'
    '#options':
      OptionA: OptionA
      OptionB: OptionB
    '#required': true
option_b:
  '#type': fieldset
  '#title': OptionA
  '#states':
    visible:
      ':input[name="choose_one_option"]':
        value: OptionA
  company_name2:
    '#type': textfield
    '#title': 'Company Name'
    '#placeholder': 'Your company name will be used for signage'
    '#required': true
  file:
    '#type': managed_file
    '#title': File