Sets the vertical fillment of terminal within its allocation. Note that yfill is only supported with yalign set to vte.types.Align.Start, and is ignored for all other yalign values.
fillment value from #VteFill
Sets the vertical fillment of terminal within its allocation. Note that yfill is only supported with yalign set to vte.types.Align.Start, and is ignored for all other yalign values.