void setValueAt(Instruction instr, long newValue, boolean assumed) {
		setValueAt(instr, BigInteger.valueOf(newValue), assumed);
	}
Set the point at which the register value has changed.
If the previous value setting should be saved, the writeValue
method should be invoked first.
@param instr set instruction or first instruction of range.
@param newValue register value
@param valueAssumed if false the value set point will be at the fall-through
address of the current instruction (normal set operation), if true the value
assumed at the start of the specified instr.  If false and instr does not
have a fall-through, this method has not affect.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/analysis/RegisterContextBuilder.java