A hash code for this chronology. <p> The hash code should be based on the entire state of the object.
@implSpec This implementation is based on the chronology ID and class. Subclasses should add any additional state that they store.
@return a suitable hash code
See Implementation
A hash code for this chronology. <p> The hash code should be based on the entire state of the object.
@implSpec This implementation is based on the chronology ID and class. Subclasses should add any additional state that they store.
@return a suitable hash code