public ArchiveWarning getWarning() {
		return warning;
	}
Get the {@link ArchiveWarning} which may have occured immediately following 
instatiation of this {@link StandAloneDataTypeManager}.  {@link ArchiveWarning#NONE}
will be returned if not warning condition.
@return warning type.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/StandAloneDataTypeManager.java