dhtmlxConnector is a server-side library that lets you access data sources. It consists of individual component-specific connectors and a set of additional ones providing advanced functionality.
A dhtmlxConnector's job is to provide necessary data exchange conditions so that you do not have to deal with the technical details of working with various data stores, systems or services. As such, each type of dhtmlxConnector is designed to use a specific API.
As the library is server-side, it provides different manipulations just on the server backend:
TreeGridConnector (relates to dhtmlxTreeGrid)
dhtmlxDataJsonConnector/dhtmlxDataConnector (related to touch-oriented libraries: DHTMLX Touch, DataTable, dhtmlXDataStore)
Throughout the documentation you'll see examples in which 'GridConnector' is used. If your use a different component, just replace GridConnector with the appropriate connector type.