anchor.diff: -
   /*
   The MIT License (MIT)
   
  
positive.code:    ;
  
  variableDefinition
     : variable ':' type defaultValue?
     ;
  
  variable
  
negative.code: 
      http://facebook.github.io/graphql/
      https://github.com/facebook/graphql
    AB:10-dep19: replaced type with type_ to resolve conflict for golang generator
  */
  grammar GraphQL;
  
  