getDateTime method
Reads an i64 from the buffer as an epoch timestamp.
The offset must satisy the relations 0 ≤ offset ≤ offset+8 ≤ this.length.
Implementation
DateTime getDateTime(final int offset, [final Endian endian = Endian.little]) {
return DateTime.fromMicrosecondsSinceEpoch(getInt64(offset, endian));
}