```\n// Property of the company SKALE Labs inc.---------------------------------\n        uint locked = \_getLockedOf(from);\n        if (locked > 0) {\n            require(\_balances[from] >= locked + amount, "Token should be unlocked for transferring");\n        }\n//-------------------------------------------------------------------------\n        \_balances[from] = \_balances[from].sub(amount);\n        \_balances[to] = \_balances[to].add(amount);\n```\n