BUG: fixed bug on method calling
BUG: fixed bug on method calling

Former-commit-id: 1d6e4b547808a06e09f5c77d0775369aced96fb1
Former-commit-id: 8ab3131c9f761eb82beaff52f727dcb7f17542d9
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox