anchor.diff:  through
       : Number ws
       | functionCall
  +    | expression
       ;
   
   whileDeclaration
  
positive.code:     ;
  
  interpolation
      : namespace_? Hash BlockStart namespace_? ( value | parent ) BlockEnd
      ;
  
  parent
  
negative.code: 
  variableName
      : ( ( Minus Minus ) Dollar | plusMinus Dollar | Dollar) identifier
      | plusMinus? ws namespace_? Dollar ( identifier | measurment )
      | Variable
      ;
  
  