public filter ( string $property, string $operator, mixed $value ) : |
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$property | string | The property to filter. |
$operator | string | The operator to use in the filter. A list of allowed operators may be found [here](https://cloud.google.com/datastore/reference/rest/v1/projects/runQuery#operator_1). Short comparison operators are provided for convenience and are mapped to their datastore-compatible equivalents. Available short operators are `=`, `<`, `<=`, `>`, and `>=`. |
$value | mixed | The value to check. |
리턴 |