Creating a Static Method Call Action 
A static method call action is used to call a static method in a class that implements a special interface. It takes a class that implements the interface and calls the static method on that class.
In the Object Creation dialog box that appears, enter name, short text, and description of the action.
Choose Create & Navigate to Object.
You are directly navigated to the action object that you have created.
Note
If you choose Create button, the created action object appears under the Assigned Objects tab. Click the name of the created object to define the action messages.

Enter the name of the class or choose
(Advanced) in the Class field.
In the list that appears, select a relevant class and choose OK.
The selected class is added.
Add expression to the action.
You can add an existing expression or create a new expression.
Add an Existing Expression
Under Sub Expressions, choose
(Graphical Access).
In the context menu, choose Select.
In the Object Query dialog box that appears, select the relevant expression and choose Select.
The selected expression gets added.
You can also choose .
Add a New Expression
Under Sub Expressions, choose
(Graphical Access).
In the context menu, choose Create.
In the Object Creation dialog box that appears, enter the name, select the type of expression and choose Create.
More information: Creating Expressions
You can also choose .
Save the action.