Found this function in my bashrc under user defined aliases; I dont remember adding it?

I don't know bash scripting

    
if [ -d ~/.bashrc.d ]; then
    for rc in ~/.bashrc.d/*; do
        if [ -f "$rc" ]; then
            . "$rc"
        fi
    done


  

I asked chatgpt and it said this is non standard? There is no bashrc.d directory on my home folder, I have uncommented the lines for now but dont know if this is benign or malignant