} else if ( this.constraints instanceof DoubleBetaConstraints ) {
setConstraints( new DoubleNonIndexSkipBetaConstraints( (DoubleBetaConstraints) this.constraints ) );
} else if ( this.constraints instanceof TripleBetaConstraints ) {
setConstraints( new TripleNonIndexSkipBetaConstraints( (TripleBetaConstraints) this.constraints ) );
} else if ( this.constraints instanceof QuadroupleBetaConstraints ) {
setConstraints( new QuadroupleNonIndexSkipBetaConstraints( (QuadroupleBetaConstraints) this.constraints ) );
}
this.indexedUnificationJoin = true;
}
}