92             if (options.constants &&
93                 {}.hasOwnProperty.call(options.constants, expression.name)) {
94                 return options.constants[expression.name];
317 function isConstant(src, constants, options) {  argument
318     if (constants === void 0) { constants = EMPTY_OBJECT; }
321         shallowEqual(lastConstants, constants) &&
326     lastConstants = constants;
334 …var _a = expressionToConstant(ast, { constants: constants }), result = _a.result, constant = _a.co…  property
339 function toConstant(src, constants, options) {  argument
340     if (constants === void 0) { constants = EMPTY_OBJECT; }
342     if (!isConstant(src, constants, options)) {