code: public GetReservedInstancesExchangeQuoteRequest withTargetConfigurations(TargetConfigurationRequest... targetConfigurations) {
          if (this.targetConfigurations == null) {
              setTargetConfigurations(new com.amazonaws.internal.SdkInternalList<TargetConfigurationRequest>(targetConfigurations.length));
          }
          for (TargetConfigurationRequest ele : targetConfigurations) {
              this.targetConfigurations.add(ele);
          }
          return this;
      }
docs: <p>
  The configuration of the target Convertible Reserved Instance to exchange for your current Convertible Reserved
  Instances.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setTargetConfigurations(java.util.Collection)} or {@link #withTargetConfigurations(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param targetConfigurations
  The configuration of the target Convertible Reserved Instance to exchange for your current Convertible
  Reserved Instances.
  @return Returns a reference to this object so that method calls can be chained together.