How to use the esotope-hammerhead.Syntax.MethodDefinition function in esotope-hammerhead

condition: (node, parent) => {
        if (node.name !== 'postMessage' || !parent)
            return false;

        // Skip: window.postMessage, postMessage.call
        if (parent.type === Syntax.MemberExpression)
            return false;

        // Skip: class X { postMessage () {} }
        if (parent.type === Syntax.MethodDefinition)
            return false;

        // Skip: class postMessage { x () {} }
        if (parent.type === Syntax.ClassDeclaration)
            return false;

        // Skip: function postMessage () { ... }
        if ((parent.type === Syntax.FunctionExpression || parent.type === Syntax.FunctionDeclaration) &&
            parent.id === node)
            return false;

        // Skip: function (postMessage) { ... } || function func(postMessage) { ... } || postMessage => { ... }
        if ((parent.type === Syntax.FunctionExpression || parent.type === Syntax.FunctionDeclaration ||
             parent.type === Syntax.ArrowFunctionExpression) && parent.params.indexOf(node) !== -1)
            return false;

// Skip: location++ || location-- || ++location || --location
        if (parent.type === Syntax.UpdateExpression && (parent.operator === '++' || parent.operator === '--'))
            return false;

        // Skip: function (location) { ... } || function func(location) { ... } || location => { ... }
        if ((parent.type === Syntax.FunctionExpression || parent.type === Syntax.FunctionDeclaration ||
             parent.type === Syntax.ArrowFunctionExpression) && parent.params.indexOf(node) !== -1)
            return false;

        // Skip already transformed: __get$Loc(location)
        if (parent.type === Syntax.CallExpression && parent.callee.type === Syntax.Identifier &&
            parent.callee.name === INSTRUCTION.getLocation)
            return false;

        // Skip: class X { location () {} }
        if (parent.type === Syntax.MethodDefinition)
            return false;

        // Skip: class location { x () {} }
        if (parent.type === Syntax.ClassDeclaration)
            return false;

        // Skip: function x (...location) {}
        if (parent.type === Syntax.RestElement)
            return false;

        return true;
    },

condition: (node, parent) => {
        if (node.name === 'eval' && parent) {
            // Skip: eval()
            if (parent.type === Syntax.CallExpression && parent.callee === node)
                return false;

            // Skip: class X { eval () {} }
            if (parent.type === Syntax.MethodDefinition)
                return false;

            // Skip: class eval { x () {} }
            if (parent.type === Syntax.ClassDeclaration)
                return false;

            // Skip: window.eval, eval.call
            if (parent.type === Syntax.MemberExpression)
                return false;

            // Skip: function eval () { ... }
            if ((parent.type === Syntax.FunctionExpression || parent.type === Syntax.FunctionDeclaration) &&
                parent.id === node)
                return false;

            // Skip: function (eval) { ... } || function func(eval) { ... } || eval => { ... }