output = new TypedIOPort(this, "output", false, true);
output.setTypeSameAs(input);
// Create and configure the variables.
senderLocation = new Parameter(this, "senderLocation");
senderLocation.setTypeEquals(new ArrayType(BaseType.DOUBLE));
senderLocation.setExpression("{0.0, 0.0}");
senderLocation.setVisibility(Settable.EXPERT);
receiverLocation = new Parameter(this, "receiverLocation");
receiverLocation.setTypeEquals(new ArrayType(BaseType.DOUBLE));
receiverLocation.setExpression("{0.0, 0.0}");
receiverLocation.setVisibility(Settable.EXPERT);
properties = new Parameter(this, "properties");