public Builder clearDigit() {
            digit_ = getDefaultInstance().getDigit();
            bitField0_ &= ~0x00000002;
            onChanged();
            return this;
        }
<code>string digit = 4;</code>

@return This builder for chaining.
turms-plugins/turms-plugin-livekit/src/main/java/im/turms/plugin/livekit/core/proto/models/SipDTMF.java