type StatsDClient : {
    gauge: (name: String, value: Number) => void,
    counter: (name: String, value: Number) => void,
    increment: (name: String, delta?: Number) => void,
    decrement: (name: String, delta?: Number) => void,
    timing: (name: String, time: Number) => void,
    close: () => void
}

-- Given a set of options returns a statsd client.
uber-statsd-client : ({
    prefix?: String,

    host?: String,
    port?: Number,
    socket_timeout?: Number,
    highWaterMark?: Number,
    isDisabled?: () => Boolean,

    packetQueue?: {
        block?: Number,
        flush?: Number,
        trailingNewLine?: Boolean
    },
    dnsResolver?: {
        timeToLive?: Number,
        seedIP?: String,
        backoffSettings?: {
            maxDelay?: Number,
            minDelay?: Number,
            retries?: Number,
            factor?: Number
        }
    }
}) => StatsDClient

uber-statsd-client/null : (capacity?: Number) => StatsDClient