public Builder addUnreachable(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      ensureUnreachableIsMutable();
      unreachable_.add(value);
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<pre>
Output only. Locations that could not be reached.
</pre>

<code>repeated string unreachable = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@param value The unreachable to add.
@return This builder for chaining.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/ListSourcesResponse.java