public int getPreferredExternalBlockSize() {
		return 0x20000; // 128K
	}
Get the preferred free range size for the EXTERNAL memory block as addressable units
within the default memory space.
@return minimum free range size for EXTERNAL memory block as addressable units
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/elf/extend/ElfLoadAdapter.java