protected boolean isAssignable(DataType varType, DataType valType) {
		// TODO: isEquivalent is not quite it
		return varType.isEquivalent(valType);
	}
Extension point: Specify whether values of a given type can be assigned to variables of
another type

<p>
The default is to check if the types are equivalent: {@link DataType#isEquivalent(DataType)}.

@param varType the variable's data type (assign to)
@param valType the value's data type (assign from)
@return true if allowed, false otherwise
Ghidra/Features/SystemEmulation/src/main/java/ghidra/pcode/struct/StructuredSleigh.java