Obtains an instance of {@code Instant} using seconds from the
epoch of 1970-01-01T00:00:00Z.
!(p)
The nanosecond field is set to zero.
@param epochSecond the number of seconds from 1970-01-01T00:00:00Z
@return an instant, not null
@throws DateTimeException if the instant exceeds the maximum or minimum instant
Obtains an instance of {@code Instant} using seconds from the epoch of 1970-01-01T00:00:00Z. !(p) The nanosecond field is set to zero.
@param epochSecond the number of seconds from 1970-01-01T00:00:00Z @return an instant, not null @throws DateTimeException if the instant exceeds the maximum or minimum instant