@type array …$0 {
An associative array of module properties used during testing.
One of either `$function` or `$extension` must be provided, or they will fail by default.

@type string $function Optional. A function name to test for the existence of.
@type string $extension Optional. An extension to check if is loaded in PHP.
@type string $constant Optional. A constant name to check for to verify an extension exists.
@type string $class Optional. A class name to check for to verify an extension exists.
@type bool $required Is this a required feature or not.
@type string $fallback_for Optional. The module this module replaces as a fallback.
}
}

Required: 是