src/Set.php
public function contains(...$values): bool
    {
        foreach ($values as $value) {
            if ( ! $this->table->hasKey($value)) {
                return false;
            }
        }

        return true;
    }
public function contains(...$values): bool
    {
        foreach ($values as $value) {
            if ( ! $this->table->hasKey($value)) {
                return false;
            }
        }

        return true;
    }
public function contains ( ... $ values ) : bool { foreach ( $ values as $ value ) { if ( ! $ this -> table -> hasKey ( $ value ) ) { return false ; } } return true ; }
Determines whether the set contains all of zero or more values.

@param mixed ...$values

@return bool true if at least one value was provided and the set
contains all given values, false otherwise.
Determines whether the set contains all of zero or more values .