public SourceType getSignatureSourceType() {
		return signatureSourceType;
	}
Get the signature source type which is used when applying the function signature
to a program. A value of {@link SourceType#DEFAULT} indicates that 
function return and parameters should not be applied.
@return signature source type
Ghidra/Features/Base/src/main/java/ghidra/app/util/demangler/DemangledFunction.java