static ProofNode<OWLAxiom> canConvertStep(ProofStep<OWLAxiom> step) {
		if (step.getName() != ElkClassInclusionExistentialComposition.NAME) {
			return null;
		}
		List<? extends ProofNode<OWLAxiom>> premises = step.getPremises();
		ProofNode<OWLAxiom> lastPremise = premises.get(premises.size() - 1);
		Collection<? extends ProofStep<OWLAxiom>> lastPremiseSteps = lastPremise
				.getInferences();
		if (lastPremiseSteps.size() != 1) {
			return null;
		}
		// else
		for (ProofStep<OWLAxiom> lastPremiseStep : lastPremiseSteps) {
			if (lastPremiseStep
					.getName() == ElkPropertyInclusionOfTransitiveObjectProperty.NAME) {
				return lastPremiseStep.getPremises().get(0);
			}
		}
		// else
		return null;
	}
static ProofNode<OWLAxiom> canConvertStep(ProofStep<OWLAxiom> step) {
		if (step.getName() != ElkClassInclusionExistentialComposition.NAME) {
			return null;
		}
		List<? extends ProofNode<OWLAxiom>> premises = step.getPremises();
		ProofNode<OWLAxiom> lastPremise = premises.get(premises.size() - 1);
		Collection<? extends ProofStep<OWLAxiom>> lastPremiseSteps = lastPremise
				.getInferences();
		if (lastPremiseSteps.size() != 1) {
			return null;
		}
		
		for (ProofStep<OWLAxiom> lastPremiseStep : lastPremiseSteps) {
			if (lastPremiseStep
					.getName() == ElkPropertyInclusionOfTransitiveObjectProperty.NAME) {
				return lastPremiseStep.getPremises().get(0);
			}
		}
		
		return null;
	}
static ProofNode < OWLAxiom > canConvertStep ( ProofStep < OWLAxiom > step ) { if ( step . getName ( ) != ElkClassInclusionExistentialComposition . NAME ) { return null ; } List < ? extends ProofNode < OWLAxiom > > premises = step . getPremises ( ) ; ProofNode < OWLAxiom > lastPremise = premises . get ( premises . size ( ) - 1 ) ; Collection < ? extends ProofStep < OWLAxiom > > lastPremiseSteps = lastPremise . getInferences ( ) ; if ( lastPremiseSteps . size ( ) != 1 ) { return null ; } // else for ( ProofStep < OWLAxiom > lastPremiseStep : lastPremiseSteps ) { if ( lastPremiseStep . getName ( ) == ElkPropertyInclusionOfTransitiveObjectProperty . NAME ) { return lastPremiseStep . getPremises ( ) . get ( 0 ) ; } } // else return null ; }
Checks if {@link ProofStep} is derived by
{@link ElkClassInclusionExistentialComposition} inference where the last
premise is derived from
{@link ElkPropertyInclusionOfTransitiveObjectProperty}

@param step
@return the transitivity axiom node that is the premise of the inference
for the last premise
Checks if { @link ProofStep } is derived by { @link ElkClassInclusionExistentialComposition } inference where the last premise is derived from { @link ElkPropertyInclusionOfTransitiveObjectProperty }