public Builder clearIndexEndpointId() {
      indexEndpointId_ = getDefaultInstance().getIndexEndpointId();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }
<pre>
Optional. The ID to use for the IndexEndpoint, which will become the final
component of the IndexEndpoint's resource name if the user specifies it.
Otherwise, IndexEndpoint id will be autogenerated.

This value should be up to 63 characters, and valid characters
are a-z, 0-9 and dash (-). The first character must be a letter, the last
must be a letter or a number.
</pre>

<code>string index_endpoint_id = 2 [(.google.api.field_behavior) = OPTIONAL];</code>

@return This builder for chaining.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/CreateIndexEndpointRequest.java