DateGroup API in Vue Pivotfieldlist API component

Defines group of date field. They are:

• Years - Defines group field as ‘Years’ for date type field.
• Quarters - Defines group field as ‘Quarters’ for date type field.
• QuarterYear - Defines group field as ‘Quarter Year’ for date type field.
• Months - Defines group field as ‘Months’ for date type field.
• Days - Defines group field as ‘Days’ for date type field.
• Hours - Defines group field as ‘Hours’ for date type field.
• Minutes - Defines group field as ‘Minutes’ for date type field.
• Seconds - Defines group field as ‘Seconds’ for date type field.