MAINT: keep _line_figure backward-compatible for DipoleFixed

Author: PragnyaKhandelwal

mne/viz/_mpl_figure.py

@@ -2378,7 +2378,10 @@ def _line_figure(inst, axes=None, picks=None, **kwargs):
     # if picks is None, only show data channels
     allowed_ch_types = _DATA_CH_TYPES_SPLIT if picks is None else _VALID_CHANNEL_TYPES
     # figure out expected number of axes
-    ch_types = np.array(inst.get_channel_types())
+    try:
+        ch_types = np.array(inst.get_channel_types())
+    except AttributeError:
+        ch_types = np.array(inst.info.get_channel_types())
     if picks is not None:
         ch_types = ch_types[picks]
     n_axes = len(np.intersect1d(ch_types, allowed_ch_types))