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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _offset_subplot_ids(fig, offsets):
 """ Apply offsets to the subplot id numbers in a figure. Note: This function mutates the input figure dict Note: This function assumes that the normalize_subplot_ids function has already been run on the figure, so that all layout subplot properties in use are explicitly present in the figure's layout. Parameters fig: dict A plotly figure dict offsets: dict A dict from subplot types to the offset to be applied for each subplot type. This dict matches the form of the dict returned by get_max_subplot_ids """

    # Offset traces
    for trace in fig.get('data', None):
        trace_type = trace.get('type', 'scatter')
        subplot_types = _trace_to_subplot.get(trace_type, [])

        for subplot_type in subplot_types:
            subplot_prop_name = _get_subplot_prop_name(subplot_type)

            # Compute subplot value prefix
            subplot_val_prefix = _get_subplot_val_prefix(subplot_type)
            subplot_val = trace.get(subplot_prop_name, subplot_val_prefix)
            subplot_number = _get_subplot_number(subplot_val)

            offset_subplot_number = (
                    subplot_number + offsets.get(subplot_type, 0))

            if offset_subplot_number > 1:
                trace[subplot_prop_name] = (
                        subplot_val_prefix + str(offset_subplot_number))
            else:
                trace[subplot_prop_name] = subplot_val_prefix

    # layout subplots
    layout = fig.setdefault('layout', {})
    new_subplots = {}

    for subplot_type in offsets:
        offset = offsets[subplot_type]
        if offset < 1:
            continue

        for layout_prop in list(layout.keys()):
            if layout_prop.startswith(subplot_type):
                subplot_number = _get_subplot_number(layout_prop)
                new_subplot_number = subplot_number + offset
                new_layout_prop = subplot_type + str(new_subplot_number)
                new_subplots[new_layout_prop] = layout.pop(layout_prop)

    layout.update(new_subplots)

    # xaxis/yaxis anchors
    x_offset = offsets.get('xaxis', 0)
    y_offset = offsets.get('yaxis', 0)

    for layout_prop in list(layout.keys()):
        if layout_prop.startswith('xaxis'):
            xaxis = layout[layout_prop]
            anchor = xaxis.get('anchor', 'y')
            anchor_number = _get_subplot_number(anchor) + y_offset
            if anchor_number > 1:
                xaxis['anchor'] = 'y' + str(anchor_number)
            else:
                xaxis['anchor'] = 'y'
        elif layout_prop.startswith('yaxis'):
            yaxis = layout[layout_prop]
            anchor = yaxis.get('anchor', 'x')
            anchor_number = _get_subplot_number(anchor) + x_offset
            if anchor_number > 1:
                yaxis['anchor'] = 'x' + str(anchor_number)
            else:
                yaxis['anchor'] = 'x'

    # annotations/shapes/images
    for layout_prop in ['annotations', 'shapes', 'images']:
        for obj in layout.get(layout_prop, []):
            if x_offset:
                xref = obj.get('xref', 'x')
                if xref != 'paper':
                    xref_number = _get_subplot_number(xref)
                    obj['xref'] = 'x' + str(xref_number + x_offset)

            if y_offset:
                yref = obj.get('yref', 'y')
                if yref != 'paper':
                    yref_number = _get_subplot_number(yref)
                    obj['yref'] = 'y' + str(yref_number + y_offset)