INFO:Detectors:
Low level call in Sender.send (tests/low_level_calls.sol#5-7):
	-_receiver.call.value(msg.value).gas(7777)() tests/low_level_calls.sol#6
Reference: https://github.com/crytic/slither/wiki/Detector-Documentation#low-level-calls
INFO:Slither:/home/travis/build/crytic/slither/scripts/../tests/expected_json/low_level_calls.low-level-calls.json exists already, the overwrite is prevented
INFO:Slither:tests/low_level_calls.sol analyzed (2 contracts), 1 result(s) found