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-rw-r--r--include/proj/crs.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/proj/crs.hpp b/include/proj/crs.hpp
index 82b2bd49..10e0a639 100644
--- a/include/proj/crs.hpp
+++ b/include/proj/crs.hpp
@@ -108,6 +108,8 @@ class PROJ_GCC_DLL CRS : public common::ObjectUsage {
PROJ_FOR_TEST CRSNNPtr shallowClone() const;
+ PROJ_INTERNAL const std::string &getExtensionProj4() const noexcept;
+
//! @endcond
protected: