docs: public void setAdditionalMasterSecurityGroups(java.util.Collection<String> additionalMasterSecurityGroups) {
          if (additionalMasterSecurityGroups == null) {
              this.additionalMasterSecurityGroups = null;
              return;
          }
  
          this.additionalMasterSecurityGroups = new com.amazonaws.internal.SdkInternalList<String>(additionalMasterSecurityGroups);
      }