@Override
	public BooleanField copyField() {
		if (isNull()) {
			BooleanField copy = new BooleanField();
			copy.setNull();
			return copy;
		}
		return new BooleanField(getLongValue() != 0);
	}
Construct a boolean data field with an initial value of b.
@param b initial value
@param immutable true if field value is immutable
Ghidra/Framework/DB/src/main/java/db/BooleanField.java