Adding the ability to switch between source and header files

after/plugin/lsp.lua

@@ -45,6 +45,13 @@ vim.api.nvim_create_autocmd('LspAttach', {
      -- WARN: This is not Goto Definition, this is Goto Declaration.
      --  For example, in C this would take you to the header.
      map('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
+
+     -- Add the ability to toggle between source and header files, but only for the
+     -- clangd clients
+     local client = vim.lsp.get_client_by_id(event.data.client_id)
+     if (client.name == "clangd") then
+         map('th', ":ClangdSwitchSourceHeader<CR>", '[T]oggle [H]eader'  )
+     end
   end
 })