converts the modifier integer into human readable represenation

(int-to-modifiers 2r001100) => #{:protected :static}

(int-to-modifiers 128 :field) => #{:transient}

(int-to-modifiers 128 :method) => #{:varargs}

converts the human readable represenation of modifiers into an int

(modifiers-to-int #{:protected :static}) => 12

(modifiers-to-int #{:transient :field}) => 128