nvaytet · Oct 12, 2026 · Oct 12, 2026 · Oct 12, 2026 · Oct 13, 2026 · Oct 13, 2026
diff --git a/packages/essreduce/pyproject.toml b/packages/essreduce/pyproject.toml
@@ -43,9 +43,11 @@ dependencies = [
 [project.optional-dependencies]
 test = [
     "ipywidgets>=8.1",
+    "ipympl>=0.9.4",
     "matplotlib>=3.10.7",
     "numba>=0.63",
     "pooch>=1.9.0",
+    "plopp>=26.10.0",
     "pytest>=9.0",
     "tof>=25.12.0",
     "pandas>=2.1.2",
@@ -59,7 +61,7 @@ docs = [
     "myst-parser>=2.0.0",
     "nbsphinx>=0.9.3",
     "numba>=0.63",
-    "plopp>=24.7.0",
+    "plopp>=26.10.0",
     "pydata-sphinx-theme>=0.14",
     "sphinx>=7",
     "sphinx-autodoc-typehints>=1.24.0",
@@ -97,6 +99,7 @@ testpaths = "tests"
 filterwarnings = [
   "error",
   'ignore:\n            Sentinel is not a public part of the traitlets API:DeprecationWarning',
+  'ignore:Passing unrecognized arguments to super:DeprecationWarning',
   'ignore:Jupyter is migrating its paths:DeprecationWarning',
 ]
 

diff --git a/packages/essreduce/src/ess/reduce/diagnostics/__init__.py b/packages/essreduce/src/ess/reduce/diagnostics/__init__.py
@@ -5,6 +5,15 @@
 data recorded during experiments.
 """
 
+import lazy_loader as lazy
+
 from .load_nexus import load_detectors, load_monitors
 
-__all__ = ['load_detectors', 'load_monitors']
+__getattr__, __dir__, _ = lazy.attach(
+    __name__,
+    submod_attrs={
+        'detector_explorer': ['DetectorExplorer'],
+    },
+)
+
+__all__ = ['DetectorExplorer', 'load_detectors', 'load_monitors']