[{"check": "low-level-calls", "impact": "Informational", "confidence": "High", "description": "Low level call in Sender.send (tests/low_level_calls.sol#5-7):\n\t-_receiver.call.value(msg.value).gas(7777)() tests/low_level_calls.sol#6\n", "function": {"name": "send", "source_mapping": {"start": 51, "length": 112, "filename": "tests/low_level_calls.sol", "lines": [5, 6, 7]}, "contract": {"name": "Sender", "source_mapping": {"start": 29, "length": 136, "filename": "tests/low_level_calls.sol", "lines": [4, 5, 6, 7, 8]}}}, "expressions": [{"expression": "_receiver.call.value(msg.value).gas(7777)()", "source_mapping": {"start": 111, "length": 45, "filename": "tests/low_level_calls.sol", "lines": [6]}}]}]