cannot call class as a function

I am currently facing an issue with computed properties, I have a model named crossconnection containing some computed properties like :

relevantPoints: computed(function () {

    if (this.get('IsCA') === true && this.get('IsCM') === true) {
        return "/assets/images/big/ca-cm.png";
    }
    else if (this.get('IsCA') === true && this.get('IsCM') === false) {
        return "/assets/images/big/ca.png";
    }
    else if (this.get('IsCA') === false && this.get('IsCM') === true) {
        return "/assets/images/big/cm.png";
    }
    else if (this.get('IsCA') === false && this.get('IsCM') === false) {
        return "/assets/images/big/nca-ncm.png";
    }

}),

when running the project I keep getting the following error :

Uncaught TypeError: Cannot call a class as a function

Can somebody please clarify ?

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PS : I am using,

• Ember : 3.0.0
• Ember Data : 3.0.2
• jQuery : 3.3.1
• Ember Bootstrap : 1.2.2