Push array inside array element in mongoose & node.js -

can push array element inside array element using push ?

newpatient.emergencycontacts.push({     emercontact_name: string,     emercontact_relation: string,     emercontact_addresses.push({         emercontact_addresstype: string,         emercontact_addressline1: string,         emercontact_addressline2: string,         emercontact_city: string,         emercontact_town: string,         emercontact_village: string,         emercontact_policstation: string,         emercontact_district: string,         emercontact_state: string,         emercontact_pincode: number     }),     emercontact_contactinfo.push({         phone: string,         email: string     }) });