function render( ctx ) {
	/* eslint-disable no-underscore-dangle */
	var transform;
	var values;
	var out;
	var i;

	values = ctx.ticks;
	debug( 'Tick values: %s.', JSON.stringify( values ) );

	debug( 'Generating tick transform...' );
	transform = tickTransform( ctx._orientation, ctx._scale );

	debug( 'Rendering ticks...' );
	out = new Array( values.length );
	for ( i = 0; i < values.length; i++ ) {
		debug( 'Rendering tick %d with value %s...', i, values[i] );
		out[ i ] = tick( ctx, values[i], transform );
	}
	debug( 'Finished rendering ticks.' );
	return out;
}
Renders axis ticks.

@private
@param {Object} ctx - context
@returns {Array<VTree>} array of virtual DOM trees