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'use strict'
var validate = require('aproba')
var log = require('npmlog')
var pulsers = 0
var pulse
module.exports = function (prefix, cb) {
validate('SF', [prefix, cb])
if (!pulsers++) {
pulse = setInterval(function () {
log.gauge.pulse('network')
}, 250)
}
return function () {
if (!--pulsers) {
clearInterval(pulse)
}
cb.apply(null, arguments)
}
}