I am done

rl/Lib/site-packages/matplotlib/tri/_trirefine.pyi

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+from typing import Literal, overload
+
+import numpy as np
+from numpy.typing import ArrayLike
+
+from matplotlib.tri._triangulation import Triangulation
+from matplotlib.tri._triinterpolate import TriInterpolator
+
+class TriRefiner:
+    def __init__(self, triangulation: Triangulation) -> None: ...
+
+class UniformTriRefiner(TriRefiner):
+    def __init__(self, triangulation: Triangulation) -> None: ...
+    @overload
+    def refine_triangulation(
+        self, *, return_tri_index: Literal[True], subdiv: int = ...
+    ) -> tuple[Triangulation, np.ndarray]: ...
+    @overload
+    def refine_triangulation(
+        self, return_tri_index: Literal[False] = ..., subdiv: int = ...
+    ) -> Triangulation: ...
+    @overload
+    def refine_triangulation(
+        self, return_tri_index: bool = ..., subdiv: int = ...
+    ) -> tuple[Triangulation, np.ndarray] | Triangulation: ...
+    def refine_field(
+        self,
+        z: ArrayLike,
+        triinterpolator: TriInterpolator | None = ...,
+        subdiv: int = ...,
+    ) -> tuple[Triangulation, np.ndarray]: ...