code: public void setInstanceTypeSpecifications(java.util.Collection<InstanceTypeSpecification> instanceTypeSpecifications) {
          if (instanceTypeSpecifications == null) {
              this.instanceTypeSpecifications = null;
              return;
          }
  
          this.instanceTypeSpecifications = new com.amazonaws.internal.SdkInternalList<InstanceTypeSpecification>(instanceTypeSpecifications);
      }
docs: <p>
  The specification for the instance types that comprise an instance fleet. Up to five unique instance
  specifications may be defined for each instance fleet.
  </p>
  
  @param instanceTypeSpecifications
  The specification for the instance types that comprise an instance fleet. Up to five unique instance
  specifications may be defined for each instance fleet.