public boolean isConstant(Varnode varnode) {
		if (varnode.isConstant()) {
			return true;
		}
		return isSuspectConstant(varnode);
	}
Check if this is a constant, or a suspect constant

@param varnode to check
@return true if should be treated as a constant for most purposes
Ghidra/Features/Base/src/main/java/ghidra/program/util/VarnodeContext.java