code: public void setDBInstances(java.util.Collection<DBInstance> dBInstances) {
          if (dBInstances == null) {
              this.dBInstances = null;
              return;
          }
  
          this.dBInstances = new com.amazonaws.internal.SdkInternalList<DBInstance>(dBInstances);
      }
docs: <p>
  A list of <a>DBInstance</a> instances.
  </p>
  
  @param dBInstances
  A list of <a>DBInstance</a> instances.