Make MGLShape.geoJSONDictionary public

[1ec5]

MGLShape.geoJSONDictionary is a computed property that converts an MGLShape to a GeoJSON-formatted NSDictionary. It’s private, but there’s no technical reason we couldn’t make it public:

mapbox-gl-native-ios/platform/darwin/src/MGLShape_Private.h

Lines 21 to 24 in 42f4257

	/**
	Returns a dictionary with the GeoJSON geometry member object.
	*/
	- (NSDictionary *)geoJSONDictionary;

Originally, we left it private because we expected developers to convert between MGLShape and GeoJSON-formatted strings or data, not dictionaries. But this method would be handy for streamlining the workaround in #275 (comment), specifically for the situation where we haven’t built a custom NSExpression function for a JSON expression operator that takes a GeoJSON object as an argument.

/cc @mapbox/maps-ios

[stale]

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