private int findEnd(DBRecord[] recs, int startIx, int colIx) {
		Field f = recs[startIx].getField(colIx);
		++startIx;
		while (startIx < recs.length && f.equals(recs[startIx].getField(colIx))) {
			if (startIx == recs.length) {
				return startIx;
			}
			++startIx;
		}
		return --startIx;
	}
Test record iterator.

@param testStoredDB test against a stored database if true, else test against cached database
           only.
@param recordCnt number of records to test
@param keyIncrement key increment, 0 = random
@param varDataSize size of variable length data fields.
@throws IOException
Ghidra/Framework/DB/src/test/java/db/DBFixedKeyIndexedTableTest.java