@Override
	public int getCurrentFreePageMapFirstPageNumber() {
		return currentFreePageMapFirstPageNumber;
	}
Returns the first page number of the current Free Page Map
@return the first page number of the current Free Page Map
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/msf/AbstractMsf.java