code: def cast(src, dtype, span=None):
      """Generic cast operator.
  
      Parameters
      ----------
      src : object
          The source operand.
      span : Optional[Span]
          The location of this operator in the source.
  
      Returns
      -------
      op : tvm.Expr
          The result Expr of cast operaton.
      """
      return _ffi_api._cast(dtype, src, span)
  
imports: from .None import _ffi_api
label_desc: Use image node_id 6 for calling a global function with example usage: cast(src, dtype, span) and returns: _ffi_api