code: private static int isIsolatedTashkeelChar(char ch){
          if (ch >= 0xfe70 && ch <= 0xfe7f && ch != NEW_TAIL_CHAR && ch != 0xFE75){
              return (1 - tashkeelMedial [ch - 0xFE70]);
          } else if(ch >= 0xfc5e && ch <= 0xfc63){
              return 1;
          } else{
              return 0;
          }
      }
docs: /*
  Name: isIsolatedTashkeelChar
  Function: Checks if the Tashkeel Character is in the isolated form
  (i.e. Unicode FE range) returns 1 else if the Tashkeel
  with shadda is in the isolated form (i.e. Unicode FC range)
  returns 1 otherwise returns 0