private void setDate(Date dt) {
		if (dt == null) {
			date = EMPTY_DATE;
		}
		else {
			date = dt;
		}
	}
Set the ingest date of the executable
@param dt is the data, which may be null
Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/query/description/ExecutableRecord.java