public AddressRangeIterator getRegisterValueAddressRanges(Register reg) {
		return programContext.getRegisterValueAddressRanges(reg);
	}
Get the value of a register that was set coming from an address to an
another address.
Note: If trackStartEndState flag is false, then this will return the current value.

@param reg value of register to get
@param fromAddr location the value came from
@param toAddr location to get the value of the register coming from fromAddr

@return value of register or null
Ghidra/Features/Base/src/main/java/ghidra/program/util/VarnodeContext.java