public Builder clearSlateId() {
      slateId_ = getDefaultInstance().getSlateId();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }
<pre>
Required. The unique identifier for the slate.
This value should conform to RFC-1034, which restricts to
lower-case letters, numbers, and hyphen, with the first character a
letter, the last a letter or a number, and a 63 character maximum.
</pre>

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

@return This builder for chaining.
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/CreateSlateRequest.java