{ "argumentTypes": null,
    "id": 74,
    "isConstant": false,
    "isLValue": false,
    "isPure": false,
    "lValueRequested": false,
    "nodeType": "UnaryOperation",
    "operator": "delete",
    "prefix": true,
    "src": "627:12:0",
    "subExpression":
     { "argumentTypes": null,
       "id": 73,
       "name": "users",
       "nodeType": "Identifier",
       "overloadedDeclarations": [],
       "referencedDeclaration": 4,
       "src": "634:5:0",
       "typeDescriptions": { 
           "typeIdentifier": "t_array$_t_uint256_$dyn_storage",
            "typeString": "uint256[] storage ref" 
            } 
        },
    "typeDescriptions": { 
        "typeIdentifier": "t_tuple$__$", 
        "typeString": "tuple()" 
        } 
    }