OptionValuesCompletionResult constructor
      const
      OptionValuesCompletionResult({ 
    
- required CompletionLevel completionLevel,
- required String optionName,
- String? pattern,
A CompletionResult that suggests the values of an option given its optionName and its completionLevel.
Implementation
const OptionValuesCompletionResult({
  required this.completionLevel,
  required this.optionName,
  this.pattern,
})  : isAbbr = false,
      includeAbbrName = false;