How to use the panflute.debug function in panflute

def _add_icon(doc, icons, icon):
    if "name" not in icon:
        # Bad formed icon
        debug("[WARNING] pandoc-latex-tip: Bad formed icon")
        return

    # Lower the color
    lower_color = icon["color"].lower()

    # Convert the color to black if unexisting
    from PIL import ImageColor

    if lower_color not in ImageColor.colormap:
        debug(
            "[WARNING] pandoc-latex-tip: "
            + lower_color
            + " is not a correct color name; using black"
        )
        lower_color = "black"

def get(key):
        '''parsing alignment'''
        key_lower = key.lower()
        if key_lower not in align_dict:
            panflute.debug(f"pantable: alignment: invalid character {key} found, replaced by the default 'd'.")
            key_lower = 'd'
        return align_dict[key_lower]

    # alignment string can be None or empty; return None: set to default by
    # panflute
    if not alignment_string:
        return

    # test valid type
    if not isinstance(alignment_string, str):
        panflute.debug("pantable: alignment should be a string. Set to default instead.")
        # return None: set to default by panflute
        return

    n = len(alignment_string)

    if n > n_col:
        alignment_string = alignment_string[:n_col]
        panflute.debug("pantable: alignment string is too long, truncated.")

    alignment = [get(key) for key in alignment_string]

    # fill up with default if too short
    if n < n_col:
        alignment += ["AlignDefault"] * (n_col - n)

    return alignment

# alignment string can be None or empty; return None: set to default by
    # panflute
    if not alignment_string:
        return

    # test valid type
    if not isinstance(alignment_string, str):
        panflute.debug("pantable: alignment should be a string. Set to default instead.")
        # return None: set to default by panflute
        return

    n = len(alignment_string)

    if n > n_col:
        alignment_string = alignment_string[:n_col]
        panflute.debug("pantable: alignment string is too long, truncated.")

    alignment = [get(key) for key in alignment_string]

    # fill up with default if too short
    if n < n_col:
        alignment += ["AlignDefault"] * (n_col - n)

    return alignment

"""parse `options['width']` if it is list of non-negative numbers
    else return None.
    """
    if 'width' not in options:
        return

    width = options['width']

    if len(width) != n_col:
        panflute.debug("pantable: given widths different from no. of columns in the table.")
        return

    try:
        width = [float(fractions.Fraction(x)) for x in width]
    except ValueError:
        panflute.debug("pantable: specified width is not valid number or fraction and is ignored.")
        return

    for width_i in width:
        if width_i < 0.:
            panflute.debug("pantable: width cannot be negative.")
            return

    return width

Plain(elem), input_format="panflute", output_format="latex"
                )
            )
        except TypeError:
            debug(
                "[WARNING] pandoc-latex-tip: icon name "
                + icon["name"]
                + " does not exist in variant "
                + icon["variant"]
                + " for collection "
                + icon["collection"]
                + "-"
                + icon["version"]
            )
        except FileNotFoundError:
            debug("[WARNING] pandoc-latex-tip: error in generating image")

    return images

use_grid_tables = options.get('grid_tables', False)

    try:
        if use_pipe_tables or use_grid_tables:
            # if both are specified, use grid_tables
            return csv2table_markdown(options, data, use_grid_tables)
        else:
            return csv2table_ast(options, data)

    # delete element if table is empty (by returning [])
    # element unchanged if include is invalid (by returning None)
    except FileNotFoundError:
        panflute.debug("pantable: include path not found. Codeblock shown as is.")
        return
    except EmptyTableError:
        panflute.debug("pantable: table is empty. Deleted.")
        # [] means delete the current element
        return []
    except ImportError:
        return

"extended-name": extended_name,
                        "color": lower_color,
                        "collection": icon["collection"],
                        "version": icon["version"],
                        "variant": icon["variant"],
                        "link": icon["link"],
                    }
                )
            else:
                debug(
                    "[WARNING] pandoc-latex-tip: "
                    + icon["name"]
                    + " is not a correct icon name"
                )
        else:
            debug(
                "[WARNING] pandoc-latex-tip: "
                + icon["variant"]
                + " does not exist in version "
                + icon["version"]
            )
    except FileNotFoundError:
        debug("[WARNING] pandoc-latex-tip: error in accessing to icons definition")

def _icon_font(collection, version, css, ttf):
    folder = appdirs.AppDirs(
        "pandoc_latex_tip", version=get_distribution("pandoc_latex_tip").version
    ).user_data_dir

    try:
        return icon_font_to_png.IconFont(
            os.path.join(folder, collection, version, css),
            os.path.join(folder, collection, version, ttf),
            True,
        )
    except FileNotFoundError as exception:
        debug("[ERROR] pandoc-latex-tip: " + str(exception))

def get_table_width(options):
    """parse `options['table-width']` if it is positive number
    else return 1.
    """
    if 'table-width' not in options:
        return 1.

    table_width = options['table-width']

    try:
        table_width = float(fractions.Fraction(table_width))
    except ValueError:
        panflute.debug("pantable: table width should be a number or fraction. Set to 1 instead.")
        return 1.

    if table_width <= 0.:
        panflute.debug("pantable: table width must be positive. Set to 1 instead.")
        return 1.

    return table_width