code: def find_all(self, find_string, flags):
          
  
          code_array = self.grid.code_array
          string_match = code_array.string_match
  
          find_keys = []
  
          for key in code_array:
              if string_match(code_array(key), find_string, flags) is not None:
                  find_keys.append(key)
  
          return find_keys
docs: Return list of all positions of event_find_string in MainGrid.
  
          Only the code is searched. The result is not searched here.
  
          Parameters:
          -----------
          gridpos: 3-tuple of Integer
          \tPosition at which the search starts
          find_string: String
          \tString to find in grid
          flags: List of strings
          \t Search flag out of
          \t ["UP" xor "DOWN", "WHOLE_WORD", "MATCH_CASE", "REG_EXP"]