Vscode configuration

I am trying to make changes to files in the sitl_gazebo folder, but my VSCode cannot find the source file to libraries included in the code to provide autocompletion. I tried to add link addresses like “${workspaceFolder}/build/px4_sitl_default/build_gazebo” and “/usr/include” to “PX4-Autopilot/.vscode/c_cpp_properties.json” file under “includePath”: section but it did not help.
I would sincerely appreciate any help.