Method on

data/src/emulator.js:407–411

(event, func)

        }
    }
    on(event, func) {
        if (!this.functions) this.functions = {};
        if (!Array.isArray(this.functions[event])) this.functions[event] = [];
        this.functions[event].push(func);
    }
    callEvent(event, data) {
        if (!this.functions) this.functions = {};
        if (!Array.isArray(this.functions[event])) return 0;