@Override
	protected boolean isVoidAllowed() {
		return true;
	}
Construct a return parameter with one or more associated storage elements.  Storage elements
may get slightly modified to adjust for the resolved datatype size.
@param dataType a fixed-length datatype.  (NOTE: Should be cloned to program datatype manager
prior to determining storage elements since their length may change)
@param storage variable storage or null for unassigned storage
@param force if true storage will be forced even if incorrect size
@param program target program
@throws InvalidInputException if dataType restrictions are violated, an invalid storage 
element is specified, or error while resolving storage element for specified datatype
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/listing/ReturnParameterImpl.java