area.defined([defined]) If defined is specified, sets the defined accessor to the specified function or boolean
d3.curveStepAfter(context)
arc.innerRadius([radius]) If radius is specified, sets the inner radius to the specified function or number
area.y0([y]) If y is specified, sets the y0 accessor to the specified function or number and returns this area
arc.startAngle([angle]) If angle is specified, sets the start angle to the specified function or number and
pie.startAngle([angle]) If angle is specified, sets the overall start angle of the pie to the specified function
d3.area() Constructs a new area generator with the default settings.
d3.radialArea()
d3.stackOrderAscending(series) Returns a series order such that the smallest series (according to the sum of values) is at the
symbol.type([type]) If type is specified, sets the symbol type to the specified function or symbol type and
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