Returns true if the given object has a method with the given name.

    :param arg: the object

    :param method: the method name
    :type method: string

    :rtype: bool

def _has_method(arg, method):
    """Returns true if the given object has a method with the given name.

    :param arg: the object

    :param method: the method name
    :type method: string

    :rtype: bool
    """
    return hasattr(arg, method) and callable(getattr(arg, method))