How to use JSL to determine whether a column has event handlers?

[#1]

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
:height << Add Column Properties(
	Set Property(
		"Event Handler",
		Event Handler( Click( JSL Quote(Function( {thisTable, thisColumn, iRow}, {},  ab=(dt<<get selected rows)[1]; );) ) )
	)
);

Thanks Experts!

[#2]

dt = Current Data Table();
col = Column(dt, "height");

colScript = col << Get Script;

？

[#3 · Accepted solution]

Names Default to Here( 1 );
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
has_handler =  !Is Empty( dt:height << Get Property( "Event Handler" ) );