Struggling to add custom graph to my plugin

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2

I’ve tried, for instance, having a different yield Metric( for each color, then doing

from cmk.gui.i18n import _
from cmk.gui.plugins.metrics import (
    metric_info,
    graph_info,
)

graph_info["hp_officejet_remaining_combined"] = {
    "metrics": [
        ("hp_officejet_remaining_Yellow", "line"),
        ("hp_officejet_remaining_Magenta", "line"),
        ("hp_officejet_remaining_Cyan", "line"),
        ("hp_officejet_remaining_Black", "line"),
    ],
}

But… where’s the graph ?

“Service graphs of host” doesn’t have it listed, for instance.