protected Data checkNextData(DataIterator dit, Class<?> dtClass, long offset, int length) {
		Data d = dit.next();
		assertNotNull(d);
		assertTrue(dtClass.isInstance(d.getDataType()));
		assertEquals(addr(offset), d.getMinAddress());
		assertEquals(length, d.getLength());
		return d;
	}
Asserts that the next value returned from the iterator matches the specified properties.

@param dit data iterator
@param dtClass data type class to expect
@param offset address offset to expect
@param length data instance length to expect
@return Data instance that iterator's .next() returned.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/plugin/core/data/AbstractDataActionTest.java