hashCode property
override
A hash-code compatible with ==.
Since operator== is defined in terms of the == operators of
the record's field values, the hash code is also computed based on the
Object.hashCode of the field values.
There is no guaranteed order in which the hashCode of field values
is accessed.
It's unspecified how those values are combined,
other than it being consistent throughout a single program execution.
Implementation
int get hashCode;