Method is_buffer

source/python.js:10487–10489

(slot)

                return this._attributes[slot].is_parameter === true;
            }
            is_buffer(slot) {
                return this._attributes[slot].is_buffer === true;
            }
            addMethod(method) {
                torch._C.TORCH_CHECK(this.findMethod(method.name()) === null);
                this._methods.push(method);