SourceType getStoredSignatureSource() {
		byte flags = rec.getByteValue(FunctionAdapter.FUNCTION_FLAGS_COL);
		int typeOrdinal = (flags &
			FunctionAdapter.FUNCTION_SIGNATURE_SOURCE) >>> FunctionAdapter.FUNCTION_SIGNATURE_SOURCE_SHIFT;
		return SourceType.values()[typeOrdinal];
	}
Sets the indicated function flag to true or false.

@param functionFlagIndicator
           the function flag from the FunctionAdapter class (i.e.
           FunctionAdapter.FUNCTION_VARARG_FLAG,
           FunctionAdapter.FUNCTION_INLINE_FLAG,
           FunctionAdapter.FUNCTION_NO_RETURN_FLAG,
           FunctionAdapter.FUNCTION_CUSTOM_PARAM_STORAGE_FLAG)
@param shouldBeSet
           true means the indicated flag should be set.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/function/FunctionDB.java