vlsuite-1.0.x-dev/modules/vlsuite_utility_classes/config/schema/vlsuite_utility_classes.schema.yml

vlsuite_utility_classes_utility:
  type: mapping
  label: 'Layout settings'
  mapping:
    apply_to:
      type: sequence
      label: 'Apply to'
      sequence:
        type: string
        label: ‘Values’
    visual_name:
      type: label
      label: 'Visual name'
    class_prefix:
      type: string
      label: 'Class'
    values:
      type: sequence
      label: 'Values'
      sequence:
        type: mapping
        mapping:
          visual_name:
            type: label
            label: 'Visual name'
          class_suffix:
            type: string
            label: 'Class'

vlsuite_utility_classes.settings:
  type: config_object
  label: 'VLSuite - Utility classes settings'
  mapping:
    list_unstyled_classes:
      type: string
      label: 'List unstyled class (or classes)'
    container_classes:
      type: string
      label: 'Container class (or classes)'
    row_classes:
      type: string
      label: 'Row class (or classes)'
    col_classes:
      type: sequence
      label: 'Col class (or classes)'
      sequence:
        type: string
        label: 'Col class (or classes)'
    utilities:
      type: sequence
      label: 'Utilities'
      sequence:
        type: vlsuite_utility_classes_utility
        label: ‘Utilities’