From 07f82fd399c9e100644173f7543aadfd96dc5804 Mon Sep 17 00:00:00 2001
From: Antony Lee <anntzer.lee@gmail.com>
Date: Wed, 29 May 2019 14:22:17 +0200
Subject: [PATCH] Make is_natively_supported private.

There's no public release where that function is available, and there
isn't a need to make it public for now.
---
 lib/matplotlib/axis.py  |  2 +-
 lib/matplotlib/units.py | 31 +++++++++++++++----------------
 2 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
index ae1eae553c0d..78fea0c58b7d 100644
--- a/lib/matplotlib/axis.py
+++ b/lib/matplotlib/axis.py
@@ -1566,7 +1566,7 @@ def have_units(self):
 
     def convert_units(self, x):
         # If x is natively supported by Matplotlib, doesn't need converting
-        if munits.ConversionInterface.is_natively_supported(x):
+        if munits._is_natively_supported(x):
             return x
 
         if self.converter is None:
diff --git a/lib/matplotlib/units.py b/lib/matplotlib/units.py
index b4677bdd3bd0..f56032b4c8c1 100644
--- a/lib/matplotlib/units.py
+++ b/lib/matplotlib/units.py
@@ -42,11 +42,11 @@ def default_units(x, axis):
 
 """
 
+from decimal import Decimal
 from numbers import Number
 
 import numpy as np
 from numpy import ma
-from decimal import Decimal
 
 from matplotlib import cbook
 
@@ -55,6 +55,20 @@ class ConversionError(TypeError):
     pass
 
 
+def _is_natively_supported(x):
+    """
+    Return whether *x* is of a type that Matplotlib natively supports or an
+    array of objects of such types.
+    """
+    # Matplotlib natively supports all number types except Decimal.
+    if np.iterable(x):
+        # Assume lists are homogeneous as other functions in unit system.
+        for thisx in x:
+            return isinstance(thisx, Number) and not isinstance(thisx, Decimal)
+    else:
+        return isinstance(x, Number) and not isinstance(x, Decimal)
+
+
 class AxisInfo:
     """
     Information to support default axis labeling, tick labeling, and limits.
@@ -134,21 +148,6 @@ def is_numlike(x):
         else:
             return isinstance(x, Number)
 
-    @staticmethod
-    def is_natively_supported(x):
-        """
-        Return whether *x* is of a type that Matplotlib natively supports or
-        *x* is array of objects of such types.
-        """
-        # Matplotlib natively supports all number types except Decimal
-        if np.iterable(x):
-            # Assume lists are homogeneous as other functions in unit system
-            for thisx in x:
-                return (isinstance(thisx, Number) and
-                        not isinstance(thisx, Decimal))
-        else:
-            return isinstance(x, Number) and not isinstance(x, Decimal)
-
 
 class DecimalConverter(ConversionInterface):
     """