The OpenFOAM-13 documentation for src/meshTools/meshSearch has the following items https://cpp.openfoam.org/v13/dir_7314f67fd2a911ec2225fce1156c35c5.html But these do not correspond to the actual source files, https://github.com/OpenFOAM/OpenFOAM-13/tree/master/src/meshTools/meshSearch