code: def chars(self, length, name, value=None, terminator=None):
          
  
          self._add_field(Char(length, name, value, terminator))
docs: Add a char array to template.
  
          `length` is given in bytes and can refer to earlier numeric fields in
          template. Special value '*' in length means that length is encoded to
          length of value and decoded as all available bytes.
  
          `value` is optional.
          `value` could be either a "String" or a "Regular Expression" and
          if it is a Regular Expression it must be prefixed by 'REGEXP:'.
  
          Examples:
          | chars | 16 | field | Hello World! |
  
          | u8 | charLength |
          | chars | charLength | field |
  
          | chars | * | field | Hello World! |
          | chars | * | field | REGEXP:^{[a-zA-Z ]+}$ |