public Builder setReasonBytes(com.google.protobuf.ByteString value) {
            copyOnWrite();
            instance.setReasonBytes(value);
            return this;
        }
<code>optional string reason = 3;</code>

@param value The bytes for reason to set.
@return This builder for chaining.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/request/group/enrollment/UpdateGroupInvitationRequest.java