public ResearchElementDefinition getPopulationTarget() { 
      if (this.populationTarget == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create ResearchDefinition.population");
        else if (Configuration.doAutoCreate())
          this.populationTarget = new ResearchElementDefinition(); // aa
      return this.populationTarget;
    }
public ResearchElementDefinition getPopulationTarget ( ) { if ( this . populationTarget == null ) if ( Configuration . errorOnAutoCreate ( ) ) throw new Error ( "Attempt to auto-create ResearchDefinition.population" ) ; else if ( Configuration . doAutoCreate ( ) ) this . populationTarget = new ResearchElementDefinition ( ) ; return this . populationTarget ; }
@return {@link #population} The actual object that is the target of the reference. The reference library doesn't populate this, but you can use it to hold the resource if you resolve it. (A reference to a ResearchElementDefinition resource that defines the population for the research.)