@java.lang.Override
  public java.lang.String getFilter() {
    java.lang.Object ref = filter_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      filter_ = s;
      return s;
    }
  }
<pre>

To filter on multiple expressions, provide each separate expression within
parentheses. For example:
```
(name = "example-cluster")
(nodeCount = "3")
```

By default, each expression is an `AND` expression. However, you can
include `AND` and `OR` expressions explicitly. For example:
```
(name = "example-cluster-1") AND
(createTime &gt; "2021-04-12T08:15:10.40Z") OR
(name = "example-cluster-2")
```
</pre>

<code>string filter = 4;</code>

@return The filter.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/ListClustersRequest.java