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My code is:
import {agentList} from '../pageObjects/agent-list';
class AgentProfile {
    constructor() {
        this.agentNameExpect = () => cy.get('.col-lg-6:nth-child(1)')
        this.firstLastNameExpect = () => cy.get('tbody > :nth-child(1) > :nth-child(2) > a')
        this.editInformationBtn = () => cy.get('[data-action="edit-info"]')
        this.firstNameEdit = () => cy.get('#agent_info_user_first')
        this.lastNameEdit = () => cy.get('#agent_info_user_last')
        this.dbaNameEdit = () => cy.get('#agent_info_dbaName').as('dban')
    }

    typeField(nameField, test) {
        this.editInformationBtn()
            .click();
        // How can I use different locators (this.firstNameEdit, this.lastNameEdit, this.dbaNameEdit e.t.c.) to make the method 'typeField' universal?
        // It doesn`t works below
        cy.get(nameField)
        // or It doesn`t works too
        this.(nameField)
        // or It is not universal method  
        this.dbaNameEdit()  
            .clear()
            .type(test)
        this.saveBtn()
            .click()
    };
}
export const agentProfile = new AgentProfile;