protected function getAcceptHeader()
    {
        return \sprintf(
            'application/%s.%s.%s+%s', $this->getStandardsTree(), $this->getSubtype(), $this->getVersion(), $this->getFormat()
        );
    }
protected function getAcceptHeader()
    {
        return \sprintf(
            'application/%s.%s.%s+%s', $this->getStandardsTree(), $this->getSubtype(), $this->getVersion(), $this->getFormat()
        );
    }
protected function getAcceptHeader ( ) { return \ sprintf ( 'application/%s.%s.%s+%s' , $ this -> getStandardsTree ( ) , $ this -> getSubtype ( ) , $ this -> getVersion ( ) , $ this -> getFormat ( ) ) ; }
Build the "Accept" header.

@return string
Build the Accept header .