This class implements the proposed time-in-range function, which takes
three time values and returns true if the first value falls between the
second and the third value.
usage: remember how much migrations are present in the
time machine, do the changes, and if not all well, restore
all of them till the last ok migration.
handles all tokens with time descriptors
sort them from the earliest one to the most
current one. it is expected, that the time
object is gregorian calendar or its extension.
Manipulator that combines the succeeding elements
with the same attributes, which were made during
different manipulations of the time table (adding,
removing sequences).
scenario 1:
make a selection from time and attributes (or from
TTElm directly), remove these elements, add new
element with given attributes and start time and end time
by creating new element.