internal static extern int clang_getCursorPlatformAvailability(CXCursor cursor,
out int always_deprecated,
out CXString deprecated_message,
out int always_unavailable,
out CXString unavailable_message,
ref CXPlatformAvailabilityPtr availability,
int availability_size);
internal static extern void clang_disposeCXPlatformAvailability(CXPlatformAvailabilityPtr availability);