public boolean hasDWO() {
		return diea.hasAttribute(DW_AT_GNU_dwo_id) && diea.hasAttribute(DW_AT_GNU_dwo_name);
	}
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