public LocalDateTime previousSerialKey()

in src/main/java/com/epam/eco/commons/series/TimeSeries.java [187:192]

• 5 lines of code
• 2 McCabe index (conditional complexity)

    public LocalDateTime previousSerialKey(LocalDateTime date) {
        Validate.notNull(date, "Date is null");

        date = toSerialKey(date, -1);
        return data.containsKey(date) ? date : null;
    }