How to add multiple choices (expressions) dynamically to Choice?

Question

Hi All, 
 I'm trying to add multiple choices to the choose function dynamically. My interfaces are dynamic , I tried displaying interfaces dynamically using a!forEach() but failed to achieve. 
 choose( 
 local!selectedTab, 
 interface 1, 
 interface 2 
 interface 3, 
 . 
 . 
 . 
 . 
 .interface n 
 ) 
 
 Thanks.

ujjwalr0002 · Accepted Answer

Check this. 
 a!localVariables(
 {
 a!buttonLayout(
 primaryButtons: a!buttonWidget(
 label: "Add material",
 saveInto: a!save(
 ri!materials,
 append(
 ri!materials,
 "material - " & if(
 a!isNullOrEmpty(ri!materials),
 1,
 length(ri!materials) + 1
 )
 )
 )
 )
 ),
 a!forEach(
 items: ri!materials,
 expression: a!boxLayout(
 label: "material 1",
 contents: a!textField(
 labelPosition: "ABOVE",
 saveInto: {},
 refreshAfter: "UNFOCUS",
 validations: {}
 ),
 style: "ACCENT",
 marginBelow: "STANDARD"
 )
 )
 }
)

How to add multiple choices (expressions) dynamically to Choice?

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