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We tested with php 7.0, 7.2, 7.3 but do have this issues.About the first issue (T_CLONE), it could be that "clone" is reserved keywords in your php version, you may change the name to "doClone()". May I know the exact version of your PHP?
About the second $func(new DataStore($data, $this->metaData), $start);
, yes the $func will be callable function. Does it throw any error to you?
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