code: function isNegationOfMemberOf(exp, objectName, {maxLength} = {}) {
      return isNegationExpression(exp) && isMemberExpOf(exp.argument, objectName, {maxLength, allowComputed: false})
  }
docs: Returns whether the expression is a negation of a member of objectName, in the specified depth.
  @param {Object} exp
  @param {string} objectName
  @param {number} maxLength
  @returns {boolean|undefined}