How to use the weasyprint.layout.preferred.shrink_to_fit function in weasyprint

box_children = list(box.enumerate_skip(skip))
    for i, (index, child) in enumerate(box_children):
        child.position_y = box.position_y
        if child.is_absolutely_positioned():
            child.position_x = position_x
            placeholder = AbsolutePlaceholder(child)
            line_placeholders.append(placeholder)
            waiting_children.append((index, placeholder))
            if child.style.position == 'absolute':
                absolute_boxes.append(placeholder)
            else:
                fixed_boxes.append(placeholder)
            continue
        elif child.is_floated():
            child.position_x = position_x
            float_width = shrink_to_fit(
                context, child, containing_block.width)

            # To retrieve the real available space for floats, we must remove
            # the trailing whitespaces from the line
            non_floating_children = [
                child_ for _, child_ in (children + waiting_children)
                if not child_.is_floated()]
            if non_floating_children:
                float_width -= trailing_whitespace_size(
                    context, non_floating_children[-1])

            if float_width > max_x - position_x or waiting_floats:
                # TODO: the absolute and fixed boxes in the floats must be
                # added here, and not in iter_line_boxes
                waiting_floats.append(child)
            else:

@handle_min_max_width
def inline_block_width(box, context, containing_block):
    if box.width == 'auto':
        box.width = shrink_to_fit(context, box, containing_block.width)

for i, child in enumerate(box.children[skip:]):
        index = i + skip
        child.position_y = box.position_y
        if child.is_absolutely_positioned():
            child.position_x = position_x
            placeholder = AbsolutePlaceholder(child)
            line_placeholders.append(placeholder)
            waiting_children.append((index, placeholder))
            if child.style['position'] == 'absolute':
                absolute_boxes.append(placeholder)
            else:
                fixed_boxes.append(placeholder)
            continue
        elif child.is_floated():
            child.position_x = position_x
            float_width = shrink_to_fit(context, child, containing_block.width)

            # To retrieve the real available space for floats, we must remove
            # the trailing whitespaces from the line
            non_floating_children = [
                child_ for _, child_ in (children + waiting_children)
                if not child_.is_floated()]
            if non_floating_children:
                float_width -= trailing_whitespace_size(
                    context, non_floating_children[-1])

            if float_width > max_x - position_x or waiting_floats:
                # TODO: the absolute and fixed boxes in the floats must be
                # added here, and not in iter_line_boxes
                waiting_floats.append(child)
            else:
                child = float_layout(

cb_x, cb_y, cb_width, cb_height = containing_block

    # TODO: handle bidi
    padding_plus_borders_x = padding_l + padding_r + border_l + border_r
    translate_x = 0
    translate_box_width = False
    default_translate_x = cb_x - box.position_x
    if left == right == width == 'auto':
        if margin_l == 'auto':
            box.margin_left = 0
        if margin_r == 'auto':
            box.margin_right = 0
        available_width = cb_width - (
            padding_plus_borders_x + box.margin_left + box.margin_right)
        box.width = shrink_to_fit(context, box, available_width)
    elif left != 'auto' and right != 'auto' and width != 'auto':
        width_for_margins = cb_width - (
            right + left + padding_plus_borders_x)
        if margin_l == margin_r == 'auto':
            if width + padding_plus_borders_x + right + left <= cb_width:
                box.margin_left = box.margin_right = width_for_margins / 2
            else:
                box.margin_left = 0
                box.margin_right = width_for_margins
        elif margin_l == 'auto':
            box.margin_left = width_for_margins
        elif margin_r == 'auto':
            box.margin_right = width_for_margins
        else:
            box.margin_right = width_for_margins
        translate_x = left + default_translate_x

def inline_block_width(box, context, containing_block):
    if box.width == 'auto':
        box.width = shrink_to_fit(context, box, containing_block.width)