in seriously.js [2294:2310]
EffectNode.prototype.removeSource = function (source) {
var i, pub = source && source.pub;
for (i in this.inputs) {
if (this.inputs.hasOwnProperty(i) &&
(this.inputs[i] === source || this.inputs[i] === pub)) {
this.inputs[i] = null;
}
}
for (i in this.sources) {
if (this.sources.hasOwnProperty(i) &&
(this.sources[i] === source || this.sources[i] === pub)) {
this.sources[i] = null;
}
}
};