src/Facebook/InstantArticles/Elements/Caption.php [201:277]:
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    public function withTextAlignment($text_alignment)
    {
        Type::enforceWithin(
            $text_alignment,
            [
                Caption::ALIGN_RIGHT,
                Caption::ALIGN_LEFT,
                Caption::ALIGN_CENTER
            ]
        );
        $this->textAlignment = $text_alignment;

        return $this;
    }

    /**
     * The vertical alignment that will be used.
     *
     * @see Caption::VERTICAL_TOP
     * @see Caption::VERTICAL_BOTTOM
     * @see Caption::VERTICAL_CENTER
     *
     * @param string $vertical_alignment alignment option that will be used.
     *
     * @return $this
     */
    public function withVerticalAlignment($vertical_alignment)
    {
        Type::enforceWithin(
            $vertical_alignment,
            [
                Caption::VERTICAL_TOP,
                Caption::VERTICAL_BOTTOM,
                Caption::VERTICAL_CENTER
            ]
        );
        $this->verticalAlignment = $vertical_alignment;

        return $this;
    }

    /**
     * @deprecated
     *
     * @param string $position
     *
     * @return $this
     */
    public function withPostion($position)
    {
        return $this->withPosition($position);
    }

    /**
     * The Text position that will be used.
     *
     * @see Caption::POSITION_ABOVE
     * @see Caption::POSITION_BELOW
     * @see Caption::POSITION_CENTER
     *
     * @param string $position that will be used.
     *
     * @return $this
     */
    public function withPosition($position)
    {
        Type::enforceWithin(
            $position,
            [
                Caption::POSITION_ABOVE,
                Caption::POSITION_BELOW,
                Caption::POSITION_CENTER
            ]
        );
        $this->position = $position;

        return $this;
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src/Facebook/InstantArticles/Elements/Cite.php [61:135]:
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    public function withTextAlignment($text_alignment)
    {
        Type::enforceWithin(
            $text_alignment,
            [
                Caption::ALIGN_RIGHT,
                Caption::ALIGN_LEFT,
                Caption::ALIGN_CENTER
            ]
        );
        $this->textAlignment = $text_alignment;

        return $this;
    }

    /**
     * The vertical alignment that will be used.
     *
     * @see Caption::VERTICAL_TOP
     * @see Caption::VERTICAL_BOTTOM
     * @see Caption::VERTICAL_CENTER
     *
     * @param string $vertical_alignment alignment option that will be used.
     *
     * @return $this
     */
    public function withVerticalAlignment($vertical_alignment)
    {
        Type::enforceWithin(
            $vertical_alignment,
            [
                Caption::VERTICAL_TOP,
                Caption::VERTICAL_BOTTOM,
                Caption::VERTICAL_CENTER
            ]
        );
        $this->verticalAlignment = $vertical_alignment;

        return $this;
    }

    /**
     * @deprecated
     *
     * @param string $position
     * @return $this
     */
    public function withPostion($position)
    {
        return $this->withPosition($position);
    }

    /**
     * The Text position that will be used.
     *
     * @see Caption::POSITION_ABOVE
     * @see Caption::POSITION_BELOW
     * @see Caption::POSITION_CENTER
     *
     * @param string $position that will be used.
     * @return $this
     */
    public function withPosition($position)
    {
        Type::enforceWithin(
            $position,
            [
                Caption::POSITION_ABOVE,
                Caption::POSITION_BELOW,
                Caption::POSITION_CENTER
            ]
        );
        $this->position = $position;

        return $this;
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