original_string: private function contains(array $system, array $set): bool
      {
          return (bool) array_filter($system, function ($entry) use ($set) {
              return $this->equals($entry, $set);
          });
      }
code: private function contains(array $system, array $set): bool
      {
          return (bool) array_filter($system, function ($entry) use ($set) {
              return $this->equals($entry, $set);
          });
      }
code_tokens: private function contains ( array $ system , array $ set ) : bool { return ( bool ) array_filter ( $ system , function ( $ entry ) use ( $ set ) { return $ this -> equals ( $ entry , $ set ) ; } ) ; }
docstring: Returns true if set is an element of system.
  
  @see \Phpml\Association\Apriori::equals()
  
  @param mixed[][] $system
  @param mixed[]   $set
docstring_tokens: Returns true if set is an element of system .