Multiple Select with Search Input
https://github.com/convertigo/c8oprj-sample-md-select
The mat_selectable SharedComponent has 4 parameters :
select_label : Placeholder Text for the Select.
search_label : Placeholder Text for the Search Input.
select_data : Array of Strings to display in the Select.
select_output : Local variable name that contains the Selected options.
In the SharedComponent class, the onKey() function is used to filter the Select options when the Search Input is filled.