FieldNames constructor
      
      FieldNames(})
     
    
    
Implementation
FieldNames(this.descriptor, this.index, this.sourcePosition, this.fieldName,
    {this.hasMethodName, this.clearMethodName, this.ensureMethodName});FieldNames(this.descriptor, this.index, this.sourcePosition, this.fieldName,
    {this.hasMethodName, this.clearMethodName, this.ensureMethodName});