code: def enabled():
      """Return whether Vitis-AI support is available"""
      if not tvm.get_global_func("relay.ext.vitis_ai.available", True):
          print("Skip because Vitis-AI codegen is not available.")
          return False
      return True
  
file_path: tvm/python/tvm/relay/op/contrib/vitis_ai.py
imports: import warnings
  import numpy
  from tvm import relay
  import tvm._ffi
  from tvm.relay import transform
  from tvm.relay.expr import Tuple, TupleGetItem
  from tvm.relay.build_module import bind_params_by_name
  from tvm.relay.op.annotation import compiler_begin, compiler_end
label_desc: Use image node_id 1 for calling a global function with example usage: enabled() and returns: True, False