An object returned by the body property representing the body of a call to an HTTP function.
The request body can be a maximum of 512kb.
Returns a Promise which resolves to the body of the call in binary as a Node.js Buffer object.
function buffer(): Promise<object>;Returns a Promise which resolves to the body of the call as a JSON object.
function json(): Promise<object>;Returns a Promise which resolves to the body of the call as a string.
function text(): Promise<string>;