How to use the @material/line-ripple/foundation function in @material/line-ripple

this.$set(this.lineClasses, className, true);
      },
      removeClass: className => {
        this.$delete(this.lineClasses, className);
      },
      hasClass: className => {
        return Boolean(this.lineClasses[className]);
      },
      setStyle: (name, value) => {
        this.$set(this.lineStyles, name, value);
      },
    };

    // note: do not call the property 'foundation' as the tests will then
    // expext all methods to be implemented, and we handle transitionend locally
    this.foundation_ = new MDCLineRippleFoundation(adapter);
    this.foundation_.init();
  },

this.$set(this.lineClasses, className, true);
      },
      removeClass: className => {
        this.$delete(this.lineClasses, className);
      },
      hasClass: className => {
        return Boolean(this.lineClasses[className]);
      },
      setStyle: (name, value) => {
        this.$set(this.lineStyles, name, value);
      },
    };

    // note: do not call the property 'foundation' as the tests will then
    // expext all methods to be implemented, and we handle transitionend locally
    this.foundation_ = new MDCLineRippleFoundation(adapter);
    this.foundation_.init();
  },