https://uk.mathworks.com/help/matlab/ref/toolboxdir.html
toolboxdir - Root folder for specified toolbox - MATLAB
This MATLAB function returns a character vector containing the absolute path to the root folder for the specified toolbox.
rootfoldertoolboxmatlab
https://vh-lab.github.io/NDI-matlab/NDI-matlab/reference/%2Bndi/%2Butil/toolboxdir.m/
ndi.util.toolboxdir - NDI-matlab
ndiutilmatlab