Set button matrix name from variable

Community Usage questions
1

Hey,

inside a variable I want to do some math.
And then set the names of a matrix button with each value

is it possible in the variable to do something like :

set('matrix_01/1.label', n2)
2

set() only sets a widget's value, you'd need to inject a custom variable in the matrix' props to expose the button's label and be able to modify it with setVar

JS{
// matrix.props
var props = {}
props.label = 'VAR_{name}' || 'default_label' 
// using underscored VAR_ so that it's scoped to the child
}

so

// anywhere.onValue
setVar('matrix_01/1', 'name', 'hellow there')