src/Collection.php
public function filter( Closure $p ) {
		return new static( array_filter( $this->elements, $p ), $this->keep_memory, $this->saver );
	}
public function filter( Closure $p ) {
		return new static( array_filter( $this->elements, $p ), $this->keep_memory, $this->saver );
	}
@inheritDoc

@return static