open fun <T> resource(path: String, parser: ByteArrayParser<T>): Single<T>
Convenience method for making a GET request to path and parsing it into a T
T - The type of object expected to be returned from a GET request to path
path - The path to make a request for over CoAP
parser - An object that knows how to construct an object of type T from a ByteArray
Return
A Single that will emit either the response parsed into a T or an error.