src/util/astUtil.js
function isNegationOfMemberOf(exp, objectName, {maxLength} = {}) {
    return isNegationExpression(exp) && isMemberExpOf(exp.argument, objectName, {maxLength, allowComputed: false})
}
function isNegationOfMemberOf(exp, objectName, {maxLength} = {}) {
    return isNegationExpression(exp) && isMemberExpOf(exp.argument, objectName, {maxLength, allowComputed: false})
}
function isNegationOfMemberOf ( exp , objectName , { maxLength } = { } ) { return isNegationExpression ( exp ) && isMemberExpOf ( exp . argument , objectName , { maxLength , allowComputed : false } ) }
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}
Returns whether the expression is a negation of a member of objectName in the specified depth .