public Builder clearKmsKey() {
        kmsKey_ = getDefaultInstance().getKmsKey();
        bitField0_ = (bitField0_ & ~0x00000001);
        onChanged();
        return this;
      }
<pre>
Immutable. The name of the Google Cloud KMS encryption key. For example,
`"projects/PROJECT_ID/locations/REGION/keyRings/KEY_RING/cryptoKeys/KEY_NAME"`.
The key must be in the same region as the workstation configuration.
</pre>

<code>string kms_key = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>

@return This builder for chaining.
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java