This component has public methods that can be invoked by integrators as necessary. Some of these methods may be implemented as Invokers, which resolve their arguments from the environment at invocation time. These methods can be configured by the integrator if necessary: arguments can be changed, and in fact the entire implementation function can be replaced by a custom function (though it is likely rare that this would be necessary or desirable).
Configuration of invokers is carried out using Demands Specifications, using the following pattern:
fluid.demands("component.name", [<context>], { invokers: { <invokerName>: { funcName: <implementation function name>, args: [<array of argument specifications>] } } });