public java.lang.String getImage() {
        java.lang.Object ref = image_;
        if (!(ref instanceof java.lang.String)) {
          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
          java.lang.String s = bs.toStringUtf8();
          image_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
<pre>
Optional. A Docker container image that defines a custom environment.

Cloud Workstations provides a number of
[preconfigured
images](https://cloud.google.com/workstations/docs/preconfigured-base-images),
but you can create your own
[custom container
images](https://cloud.google.com/workstations/docs/custom-container-images).
If using a private image, the `host.gceInstance.serviceAccount` field
must be specified in the workstation configuration and must have
permission to pull the specified image. Otherwise, the image must be
publicly accessible.
</pre>

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

@return The image.
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/WorkstationConfig.java