code: protected ILinkingCandidate createCandidate(SarlCastedExpression cast,
  			ExpressionTypeComputationState state,
  			IIdentifiableElementDescription description) {
  		return new CastOperatorLinkingCandidate(cast, description,
  				getSingleExpectation(state),
  				state);
  	}
docs: Create a candidate from the given description.
  
  @param cast the cast operator.
  @param state the state
  @param description the description of the cast linked operation.
  @return the linking candidate.