code: def find(name):
      """Locate a filename into the shader library."""
      if op.exists(name):
          return name
  
      path = op.dirname(__file__) or "."
  
      paths = [path] + config["include_path"]
  
      for path in paths:
          filename = op.abspath(op.join(path, name))
          if op.exists(filename):
              return filename
  
          for d in os.listdir(path):
              fullpath = op.abspath(op.join(path, d))
              if op.isdir(fullpath):
                  filename = op.abspath(op.join(fullpath, name))
                  if op.exists(filename):
                      return filename
  
      return None
  
imports: import os
  import os.path
  from ..None import config
label_desc: Use image node_id 1 for calling a global function with example usage: find(name) and returns: None, name, filename, filename