add adds a new item to the component
changeId changes the id of an element of a data collection
copy creates a copy of an item at the defined position
exists checks whether the specified item exists in the component
filter filters items in the component by the specified key
find finds an item that corresponds to the specified parameters
findAll finds all the items that correspond to the specified parameters
forEach iterates over all items of a data collection
getId returns the id of the item by its index
getIndex returns the index of the item by its id
getInitialData returns the initial values of the items of a widget initialized in a data collection
getLength returns the number of all elements of a data collection
isDataLoaded checks whether the specified data range is loaded from the server
isSaved checks whether the changes made in a data collection are saved to the server side
load loads data from an external file
map iterates through all items of the component
mapRange returns a new array of the items correspond to the specified parameters
move moves an item to the defined position
parse loads data from a local data source
reduce reduces the array to a single value
remove deletes the specified item from the component
removeAll deletes all the items from the component
save saves changes made in a data collection to the server side
serialize serializes the component data into JSON, XML or CSV format
sort sorts data items in a component
update updates properties of the item
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