func IsTerminal(writer io.Writer) bool {
	if fd, ok := fileDescriptor(writer); ok {
		return terminal.IsTerminal(fd)
	}
	return false
}
func IsTerminal(writer io.Writer) bool {
	if fd, ok := fileDescriptor(writer); ok {
		return terminal.IsTerminal(fd)
	}
	return false
}
func IsTerminal ( writer io . Writer ) bool { if fd , ok := fileDescriptor ( writer ) ; ok { return terminal . IsTerminal ( fd ) } return false }
// IsTerminal returns true if the writer is a terminal.
IsTerminal returns true if the writer is a terminal .