public long getRangeListsBase() {
		return diea.getUnsignedLong(DW_AT_rnglists_base, 0);
	}
Get the source language of the compile unit.
<p>
See {@link DWARFSourceLanguage} for values.

@return the source language of the compile unit, or -1 if not set
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/DWARFCompilationUnit.java