@java.lang.Override
  public java.lang.String getFormat() {
    java.lang.Object ref = format_;
    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();
      format_ = s;
      return s;
    }
  }
<pre>
Optional. The format of the data.
Supported formats:
 for NUMBER type: "float", "double"
 for INTEGER type: "int32", "int64"
 for STRING type: "email", "byte", etc
</pre>

<code>string format = 7 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The format.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Schema.java