code: def _cast(func_id, args):
      _internal_assert(
          args.__len__() == 1 and isinstance(args[0], _expr.PrimExpr),
          "Only one expression can be cast",
      )
      return _expr.Cast(func_id, args[0])
  
file_path: tvm/python/tvm/te/hybrid/calls.py
imports: from tvm.runtime import const, convert
  import tvm.te
  from tvm.ir.container import Array
  from tvm.target import Target
  from tvm.tir import expr
  from tvm.tir import call_intrin
  from tvm.tir.stmt import ForKind
  from .utils import _internal_assert
label_desc: Use image node_id 7 for calling a global function with example usage: _cast(func_id, args) and returns: _expr