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Lets-Plot Kotlin API without dependencies.
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package org.jetbrains.letsPlot.geom

import org.jetbrains.letsPlot.Stat
import org.jetbrains.letsPlot.core.spec.Option
import org.jetbrains.letsPlot.intern.GeomKind
import org.jetbrains.letsPlot.intern.Layer
import org.jetbrains.letsPlot.intern.Options
import org.jetbrains.letsPlot.intern.layer.*
import org.jetbrains.letsPlot.intern.layer.geom.SpokeAesthetics
import org.jetbrains.letsPlot.intern.layer.geom.SpokeMapping
import org.jetbrains.letsPlot.pos.positionIdentity
import org.jetbrains.letsPlot.tooltips.TooltipOptions

@Suppress("ClassName")
/**
 * Draws a straight line segment with given length and angle from the starting point.
 *
 * ## Examples
 *
 * - [geom_spoke.ipynb](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/f-4.6.0/geom_spoke.ipynb)
 *
 * - [geom_spoke_arrow.ipynb](https://nbviewer.jupyter.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/f-4.7.1/geom_spoke_arrow.ipynb)
 *
 * @param data The data to be displayed in this layer. If null, the default, the data
 *  is inherited from the plot data as specified in the call to [letsPlot][org.jetbrains.letsPlot.letsPlot].
 * @param stat The statistical transformation to use on the data for this layer.
 *  Supported transformations: `Stat.identity`, `Stat.bin()`, `Stat.count()`, etc. see [Stat][org.jetbrains.letsPlot.Stat].
 * @param position Position adjustment: `positionIdentity`, `positionStack()`, `positionDodge()`, etc. see
 *  [Position](https://lets-plot.org/kotlin/-lets--plot--kotlin/org.jetbrains.letsPlot.pos/).
 * @param showLegend default = true.
 *  false - do not show legend for this layer.
 * @param sampling Result of the call to the `samplingXxx()` function.
 *  To prevent any sampling for this layer pass value `samplingNone`.
 *  For more info see [sampling.md](https://github.com/JetBrains/lets-plot-kotlin/blob/master/docs/sampling.md).
 * @param tooltips Result of the call to the `layerTooltips()` function.
 *  Specifies appearance, style and content.
 * @param arrow Specification for arrow head, as created by `arrow()` function.
 * @param pivot default = "tail" ("tail", "middle", "mid", "tip").
 *  The part of the segment that is anchored to the plane. The segment rotates about this point.
 * @param x X-axis value.
 * @param y Y-axis value.
 * @param angle Slope's angle in radians.
 * @param radius Segment length.
 * @param alpha Transparency level of a layer. Understands numbers between 0 and 1.
 * @param color Color of the line.
 *  String in the following formats:
 *  - RGB/RGBA (e.g. "rgb(0, 0, 255)")
 *  - HEX (e.g. "#0000FF")
 *  - color name (e.g. "red")
 *  - role name ("pen", "paper" or "brush")
 *
 *  Or an instance of the `java.awt.Color` class.
 * @param linetype Type of the line.
 *  Codes and names: 0 = "blank", 1 = "solid", 2 = "dashed", 3 = "dotted", 4 = "dotdash",
 *  5 = "longdash", 6 = "twodash".
 * @param size Line width.
 * @param colorBy default = "color" ("fill", "color", "paint_a", "paint_b", "paint_c").
 *  Defines the color aesthetic for the geometry.
 * @param mapping Set of aesthetic mappings.
 *  Aesthetic mappings describe the way that variables in the data are
 *  mapped to plot "aesthetics".
 */
class geomSpoke(
    data: Map<*, *>? = null,
    stat: StatOptions = Stat.identity,
    position: PosOptions = positionIdentity,
    showLegend: Boolean = true,
    sampling: SamplingOptions? = null,
    tooltips: TooltipOptions? = null,
    private val arrow: Map? = null,
    private val pivot: String? = null,
    override val x: Number? = null,
    override val y: Number? = null,
    override val angle: Number? = null,
    override val radius: Number? = null,
    override val alpha: Number? = null,
    override val color: Any? = null,
    override val linetype: Any? = null,
    override val size: Number? = null,
    override val colorBy: String? = null,
    mapping: SpokeMapping.() -> Unit = {}
) : SpokeAesthetics,
    WithColorOption,
    Layer(
        mapping = SpokeMapping().apply(mapping).seal(),
        data = data,
        geom = GeomOptions(GeomKind.SPOKE),
        stat = stat,
        position = position,
        showLegend = showLegend,
        sampling = sampling,
        tooltips = tooltips
    ) {
    override fun seal(): Options {
        return super.seal() +
                super.seal() +
                Options.of(
                    Option.Geom.Spoke.ARROW to arrow,
                    Option.Geom.Spoke.PIVOT to pivot
                )
    }
}