public DataIterator getData(Address start, boolean forward) {
		return new DataFilteredCodeUnitIterator(getCodeUnits(start, forward));
	}
Returns an iterator over all data in the program from the given start address to either the 
end address or the start address, depending if the iterator is forward or not.
@param start the starting address for the iterator.
@param forward if true the iterator returns all data from the given start address to the end 
of the program, otherwise it returns all data from the given start address to the start of 
the program.
@return the iterator
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CodeManager.java