public Builder setBootDiskSizeGb(int value) {

          bootDiskSizeGb_ = value;
          bitField0_ |= 0x00000400;
          onChanged();
          return this;
        }
<pre>
Optional. The size of the boot disk for the VM in gigabytes (GB).
The minimum boot disk size is `30` GB. Defaults to `50` GB.
</pre>

<code>int32 boot_disk_size_gb = 9 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The bootDiskSizeGb to set.
@return This builder for chaining.
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/WorkstationConfig.java