src/Sherlock/components/filters/Bool.php
public function must($value)
    {
        $args = $this->normalizeFuncArgs(func_get_args());

        foreach ($args as $arg) {
            if ($arg instanceof FilterInterface) {
                $this->params['must'][] = $arg->toArray();
            }
        }

        return $this;
    }
public function must($value)
    {
        $args = $this->normalizeFuncArgs(func_get_args());

        foreach ($args as $arg) {
            if ($arg instanceof FilterInterface) {
                $this->params['must'][] = $arg->toArray();
            }
        }

        return $this;
    }
Must clause of Bool

@param FilterInterface|array $value Single or array of FilterInterface objects

@return $this