All calls to HasProperties.addListener either pass instance methods,

fsl/fslview/controls/histogramcontrolpanel.py

fsl/fslview/controls/overlaydisplaypanel.py

fsl/fslview/gl/colourbarcanvas.py

fsl/fslview/gl/gl14/gllinevector_funcs.py

fsl/fslview/gl/gl21/gllinevector_funcs.py

fsl/fslview/gl/gllabel.py

fsl/fslview/gl/gllinevector.py

fsl/fslview/gl/glmask.py

fsl/fslview/gl/glmodel.py

fsl/fslview/gl/glvector.py

fsl/fslview/gl/glvolume.py

fsl/fslview/gl/lightboxcanvas.py

fsl/fslview/gl/slicecanvas.py

fsl/fslview/gl/textures/imagetexture.py

fsl/fslview/views/orthopanel.py

fsl/fslview/views/timeseriespanel.py

fsl/tools/bet.py

fsl/tools/feat.py