Rewrite PlotCanvas.get_layoutable_children() to not use get(side)
Rewrite PlotCanvas.get_layoutable_children() to not use get(side)

bokeh/bokeh,philippjfr/bokeh,azjps/bokeh,rs2/bokeh,percyfal/bokeh,ericmjl/bokeh,azjps/bokeh,timsnyder/bokeh,philippjfr/bokeh,DuCorey/bokeh,percyfal/bokeh,aavanian/bokeh,aiguofer/bokeh,stonebig/bokeh,Karel-van-de-Plassche/bokeh,philippjfr/bokeh,rs2/bokeh,jakirkham/bokeh,mindriot101/bokeh,aiguofer/bokeh,Karel-van-de-Plassche/bokeh,dennisobrien/bokeh,aiguofer/bokeh,bokeh/bokeh,draperjames/bokeh,bokeh/bokeh,percyfal/bokeh,draperjames/bokeh,aiguofer/bokeh,draperjames/bokeh,jakirkham/bokeh,stonebig/bokeh,azjps/bokeh,schoolie/bokeh,DuCorey/bokeh,rs2/bokeh,mindriot101/bokeh,dennisobrien/bokeh,mindriot101/bokeh,bokeh/bokeh,Karel-van-de-Plassche/bokeh,aavanian/bokeh,philippjfr/bokeh,schoolie/bokeh,ericmjl/bokeh,ericmjl/bokeh,timsnyder/bokeh,stonebig/bokeh,azjps/bokeh,Karel-van-de-Plassche/bokeh,timsnyder/bokeh,schoolie/bokeh,aavanian/bokeh,timsnyder/bokeh,aavanian/bokeh,schoolie/bokeh,ericmjl/bokeh,jakirkham/bokeh,azjps/bokeh,dennisobrien/bokeh,percyfal/bokeh,ericmjl/bokeh,bokeh/bokeh,dennisobrien/bokeh,mindriot101/bokeh,draperjames/bokeh,philippjfr/bokeh,jakirkham/bokeh,DuCorey/bokeh,schoolie/bokeh,dennisobrien/bokeh,DuCorey/bokeh,aavanian/bokeh,Karel-van-de-Plassche/bokeh,rs2/bokeh,draperjames/bokeh,stonebig/bokeh,jakirkham/bokeh,timsnyder/bokeh,DuCorey/bokeh,rs2/bokeh,percyfal/bokeh,aiguofer/bokeh