public Builder mergeFrom(
            com.google.cloud.workstations.v1beta.WorkstationConfig.PersistentDirectory
                    .GceRegionalPersistentDisk
                other) {
          if (other
              == com.google.cloud.workstations.v1beta.WorkstationConfig.PersistentDirectory
                  .GceRegionalPersistentDisk.getDefaultInstance()) return this;
          if (other.getSizeGb() != 0) {
            setSizeGb(other.getSizeGb());
          }
          if (!other.getFsType().isEmpty()) {
            fsType_ = other.fsType_;
            bitField0_ |= 0x00000002;
            onChanged();
          }
          if (!other.getDiskType().isEmpty()) {
            diskType_ = other.diskType_;
            bitField0_ |= 0x00000004;
            onChanged();
          }
          if (!other.getSourceSnapshot().isEmpty()) {
            sourceSnapshot_ = other.sourceSnapshot_;
            bitField0_ |= 0x00000008;
            onChanged();
          }
          if (other.reclaimPolicy_ != 0) {
            setReclaimPolicyValue(other.getReclaimPolicyValue());
          }
          this.mergeUnknownFields(other.getUnknownFields());
          onChanged();
          return this;
        }
<pre>
A PersistentDirectory backed by a Compute Engine regional persistent
disk. The
[persistent_directories][google.cloud.workstations.v1beta.WorkstationConfig.persistent_directories]
field is repeated, but it may contain only one entry. It creates a
[persistent
disk](https://cloud.google.com/compute/docs/disks/persistent-disks) that
mounts to the workstation VM at `/home` when the session starts and
detaches when the session ends. If this field is empty, workstations
created with this configuration do not have a persistent home
directory.
</pre>

Protobuf type {@code
google.cloud.workstations.v1beta.WorkstationConfig.PersistentDirectory.GceRegionalPersistentDisk}
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java