anchor.diff:  // whitespace, line breaks, comments, ...
   
   LINE_CONTINUATION
  -   : ' ' '_' '\r'? '\n' -> skip
  +   : ' ' '_' '\r'? '\n' -> channel(HIDDEN)
      ;
   
   
  
positive.code: // letters
  
  fragment LETTER
     : [a-zA-Z_äöüÄÖÜ]
     ;
  
  
  fragment LETTERORDIGIT
     : [a-zA-Z0-9_äöüÄÖÜ]
     ;
  
  // case insensitive chars
  
negative.code: 	;
  
  // block ----------------------------------
  
  moduleBlock
     : block
     ;
  