public Builder setCryptoKeyName(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      cryptoKeyName_ = value;
      bitField0_ |= 0x00000400;
      onChanged();
      return this;
    }
<pre>
Optional. The resource name of a KMS crypto key used to encrypt or decrypt
the data associated with the workflow.

Format:
projects/{project}/locations/{location}/keyRings/{keyRing}/cryptoKeys/{cryptoKey}

Using `-` as a wildcard for the `{project}` or not providing one at all
will infer the project from the account.

If not provided, data associated with the workflow will not be
CMEK-encrypted.
</pre>

<code>
string crypto_key_name = 11 [(.google.api.field_behavior) = OPTIONAL, (.google.api.resource_reference) = { ... }
</code>

@param value The cryptoKeyName to set.
@return This builder for chaining.
java-workflows/proto-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/Workflow.java