Function isConvertibleFunction

test/fixtures/snapshot/typescript.js:144796–144802

(node, checker)

        }
    }
    function isConvertibleFunction(node, checker) {
        return !ts.isAsyncFunction(node) &&
            node.body &&
            ts.isBlock(node.body) &&
            hasReturnStatementWithPromiseHandler(node.body, checker) &&
            returnsPromise(node, checker);
    }
    function returnsPromise(node, checker) {
        var signature = checker.getSignatureFromDeclaration(node);
        var returnType = signature ? checker.getReturnTypeOfSignature(signature) : undefined;