    deferred class
    	EV_ARROWED_FIGURE

    General
    	cluster: interface
    	description: "Figure that is can have an arrowhead at its start or endpoint."
    	keywords: "figure, line, arrow"

    Ancestors
    	ANY
    	EV_FIGURE_MATH

    Queries
    	Arrow_size: INTEGER_32
    	is_end_arrow: BOOLEAN
    	is_start_arrow: BOOLEAN
    	line_width: INTEGER_32

    Commands
    	disable_end_arrow
    	disable_start_arrow
    	enable_end_arrow
    	enable_start_arrow