code: def get_float_relative(strings: Sequence[str],
                         prefix1: str,
                         delta: int,
                         prefix2: str,
                         ignoreleadingcolon: bool = False) -> Optional[float]:
      
      return get_float_raw(get_string_relative(
          strings, prefix1, delta, prefix2,
          ignoreleadingcolon=ignoreleadingcolon))
docs: Fetches a float parameter via :func:`get_string_relative`.