.haskey - macmcmeans/localDataStorage GitHub Wiki
localDataStorage.haskey( keyName )
This checks the store for the existence of keyName and returns true or false (query by name). The argument is case-sensitive.
EXAMPLE:
● localData.haskey( 'key2' ) --> true
To determine if a certain value exists in the store, use hasval, and to check whether a specific data type exists, use hastype.