question: returns the empty map . concode_field_sep Map mMap concode_elem_sep boolean mUnderConstruction concode_field_sep Map<K,V> build concode_elem_sep HashMap<K,V> newHashMap concode_elem_sep Builder<K,V> builder concode_elem_sep Builder<K,V> put
target: Map < K , V > function ( ) { return newHashMap ( ) ; }