libclang-dev 1:10.0-49ubuntu2 (amd64 binary) in ubuntu focal

 Clang project is a C, C++, Objective C and Objective C++ front-end
 for the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler
 Collection (GCC).
 .
 Clang implements all of the ISO C++ 1998, 11 and 14 standards and also
 provides most of the support of C++17.
 .
 This is a dependency package providing the default libclang libraries and
 headers.