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