@Override
			public DBRecord next() throws IOException {
				DBRecord ret = next;
				next = it.next();
				return ret;
			}
Given an iterator over a closed range. Change its behavior to exclude the lower bound

@param it the iterator over the closed range
@param columnIndex the column number whose index being iterated
@param exclude the lower bound to be excluded
Ghidra/Debug/ProposedUtils/src/main/java/ghidra/util/database/DirectedRecordIterator.java