public Varnode getRegisterVarnode(Register register) {
		return trans.getVarnode(register);
	}
Extend a constant value if it can be extended.

@param out varnode to extend into (for size)
@param in varnode value to extend the size
@return new sign extended varnode
Ghidra/Features/Base/src/main/java/ghidra/program/util/VarnodeContext.java