src/Builder/AttachmentBuilder.php
public function addField($title, $value, $isShort)
    {
        $this->fields->add(new Field($title, $value, $isShort));

        return $this;
    }
public function addField($title, $value, $isShort)
    {
        $this->fields->add(new Field($title, $value, $isShort));

        return $this;
    }
@param string $title
@param string $value
@param bool   $isShort

@return $this