code: def files_handler(ctx, param, value):
      """Process and validate input file names"""
      return value
  
file_path: rasterio/rasterio/rio/rasterize.py
imports: import json
  import logging
  from math import ceil
  from affine import Affine
  import click
  import rasterio
  from rasterio.errors import CRSError
  from rasterio.coords import disjoint_bounds
  from rasterio.rio import options
  from rasterio.rio.helpers import resolve_inout
  import rasterio.shutil
label_desc: Use image node_id 1 for calling a global function with example usage: files_handler(ctx, param, value) and returns: value