public Builder setAtomKeyBytes(com.google.protobuf.ByteString value) {
        if (value == null) {
          throw new NullPointerException();
        }
        checkByteStringIsUtf8(value);
        atomKey_ = value;
        bitField0_ |= 0x00000001;
        onChanged();
        return this;
      }
<pre>
Required. The `EditAtom.key` that references atom with text inputs in the
`Job.edit_list`.
</pre>

<code>string atom_key = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@param value The bytes for atomKey to set.
@return This builder for chaining.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/TextStream.java