Const correctness (because it's not an API break)

Author: elpaso

python/core/auto_generated/qgsvectorlayerutils.sip.in

@@ -133,7 +133,7 @@ Returns true if the attribute value is valid for the field. Any constraint failu
 If the strength or origin parameter is set then only constraints with a matching strength/origin will be checked.
 %End
 
-    static QgsFeature createFeature( QgsVectorLayer *layer,
+    static QgsFeature createFeature( const QgsVectorLayer *layer,
                                      const QgsGeometry &geometry = QgsGeometry(),
                                      const QgsAttributeMap &attributes = QgsAttributeMap(),
                                      QgsExpressionContext *context = 0 );
@@ -178,7 +178,7 @@ are padded with NULL values to match the required length).
 %End
 
 
-    static QgsFeatureList makeFeaturesCompatible( const QgsFeatureList &features, QgsVectorLayer &layer );
+    static QgsFeatureList makeFeaturesCompatible( const QgsFeatureList &features, const QgsVectorLayer &layer );
 %Docstring
 Converts input ``features`` to be compatible with the given ``layer``.
 

src/core/qgsvectorlayerutils.cpp

@@ -349,7 +349,7 @@ bool QgsVectorLayerUtils::validateAttribute( const QgsVectorLayer *layer, const
   return valid;
 }
 
-QgsFeature QgsVectorLayerUtils::createFeature( QgsVectorLayer *layer, const QgsGeometry &geometry,
+QgsFeature QgsVectorLayerUtils::createFeature( const QgsVectorLayer *layer, const QgsGeometry &geometry,
     const QgsAttributeMap &attributes, QgsExpressionContext *context )
 {
   if ( !layer )
@@ -561,7 +561,7 @@ void QgsVectorLayerUtils::matchAttributesToFields( QgsFeature &feature, const Qg
   }
 }
 
-QgsFeatureList QgsVectorLayerUtils::makeFeaturesCompatible( const QgsFeatureList &features, QgsVectorLayer &layer )
+QgsFeatureList QgsVectorLayerUtils::makeFeaturesCompatible( const QgsFeatureList &features, const QgsVectorLayer &layer )
 {
   QgsWkbTypes::Type inputWkbType( layer.wkbType( ) );
   QgsFeatureList resultFeatures;

src/core/qgsvectorlayerutils.h

@@ -140,7 +140,7 @@ class CORE_EXPORT QgsVectorLayerUtils
      * assuming that they respect the layer's constraints. Note that the created feature is not
      * automatically inserted into the layer.
      */
-    static QgsFeature createFeature( QgsVectorLayer *layer,
+    static QgsFeature createFeature( const QgsVectorLayer *layer,
                                      const QgsGeometry &geometry = QgsGeometry(),
                                      const QgsAttributeMap &attributes = QgsAttributeMap(),
                                      QgsExpressionContext *context = nullptr );
@@ -207,7 +207,7 @@ class CORE_EXPORT QgsVectorLayerUtils
      *
      * \since QGIS 3.4
      */
-    static QgsFeatureList makeFeaturesCompatible( const QgsFeatureList &features, QgsVectorLayer &layer );
+    static QgsFeatureList makeFeaturesCompatible( const QgsFeatureList &features, const QgsVectorLayer &layer );
 
 };