/usr/share/php/JsonSchema/Constraints/ is in php-json-schema 1.6.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/JsonSchema/Constraints/CollectionConstraint.php
/usr/share/php/JsonSchema/Constraints/Constraint.php
/usr/share/php/JsonSchema/Constraints/ConstraintInterface.php
/usr/share/php/JsonSchema/Constraints/EnumConstraint.php
/usr/share/php/JsonSchema/Constraints/Factory.php
/usr/share/php/JsonSchema/Constraints/FormatConstraint.php
/usr/share/php/JsonSchema/Constraints/NumberConstraint.php
/usr/share/php/JsonSchema/Constraints/ObjectConstraint.php
/usr/share/php/JsonSchema/Constraints/SchemaConstraint.php
/usr/share/php/JsonSchema/Constraints/StringConstraint.php
/usr/share/php/JsonSchema/Constraints/TypeConstraint.php
/usr/share/php/JsonSchema/Constraints/UndefinedConstraint.php