How to get calendar hoursPerday based on Calendar id

How to pass which calendar is for selected task in the method you mentioned

No !!
Unable to get how to do it .

Hi Alex
We have Two native Fields of Date Type let us Date_1 and Date_2 for Each task we want to get the difference between this dates in hours but the difference should be calculated based on calendar assigned to each of task . Hope it makes you clear

Hi We want difference between two days based on calendar for task . In hours unit

Hi
Thanks for update
Any work round for version 4.0.0

HI
lag is working fine but relationship type is not changing

   project.dependencyStore.getById(id).lag = 20
   // This is not working , initially relation ship is 1 now i changed to 3 it does not change 
    project.dependencyStore.getById(id).type = 3;

Hi
We have different editor for assigning and updating the successor records .
If any values is changed let say lag and relation ship type is changed now i want to update it in dependency store how can do it and what are the data we need to pass . I have gone through docs no update method is there .