src/Client/QueryParam.php
public function buildHeaders($options)
    {
        $options = $this->resolve($options);
        $headerOptions = [];

        foreach ($this->headerParameters as $key => $isHeaderParameter) {
            if ($isHeaderParameter && isset($options[$key])) {
                $headerOptions[$key] = $options[$key];
            }
        }

        return $headerOptions;
    }
public function buildHeaders($options)
    {
        $options = $this->resolve($options);
        $headerOptions = [];

        foreach ($this->headerParameters as $key => $isHeaderParameter) {
            if ($isHeaderParameter && isset($options[$key])) {
                $headerOptions[$key] = $options[$key];
            }
        }

        return $headerOptions;
    }
Build headers list.

@param $options

@return array