new ApiGatewayResponse(callback)
    .status(200)
    .headers({
        'access-control-allow-origin': '*'
    })
    .body({
        "foo": "bar"
    })
    .send();

{
    statusCode: 200,
    headers: {
        "access-control-allow-origin": "*"
    },
    body: {
        "foo": "bar"
    }
}

var ApiGatewayResponse = require('lambda-api-gateway-response');
 
exports.myHandler = function(event, context, callback) {
 return new ApiGatewayResponse(callback)
    .status(200)
    .headers({
        'access-control-allow-origin': '*'
    })
    .body({
        "foo": "bar"
    })
    .send();
}