Function builtin_format_posixct 

fn builtin_format_posixct(
    args: &[RValue],
    named: &[(String, RValue)],
) -> Result<RValue, RError>

Format a POSIXct object as a character string.

@param x a POSIXct object @param format strftime-style format string (default “%Y-%m-%d %H:%M:%S”) @return character vector of formatted datetime strings