"refresh" an enumProperty

Coding Python Support
1

here is part of my register function:

def register():
    from bpy.types import WindowManager
    from bpy.props import StringProperty, EnumProperty
    
    wm = WindowManager


    wm.selected_material = EnumProperty(items = enum_previews_from_directory_items)

I have a text box that I want the user to use if they want to search for an item in that list. How do I “reload” or “refresh” the EnumProperty to update the items?

OR,

is there an easy way to exclude items from there that don’t match the search?