The viewport that frames bb inside a widthxheight canvas whose rightmost
gutter pixels are covered, or null to fall back to cytoscape's own fit
(nothing covered, the strip too narrow, or a degenerate box) — which keeps
the un-paneled case byte-identical to plain cy.fit().
The viewport that frames
bbinside awidthxheightcanvas whose rightmostgutterpixels are covered, ornullto fall back to cytoscape's own fit (nothing covered, the strip too narrow, or a degenerate box) — which keeps the un-paneled case byte-identical to plaincy.fit().