General Issue: Update ... and args to sources in admiral-class based functions

[zdz2101]

Background Information

As part of our efforts to get to a 1.0 version of admiral, we are looking over all functions for consistency and user-friendliness.

Several functions use ... or args to call upon a list of admiral-specific class (usually xxx_source) objects: e.g. date_source dthcaus_source records_source etc. The following functions are affected:

• call_derivation()
• derive_var_dthcaus()
• derive_var_extreme_dt()
• derive_var_extreme_dtm()
• params()
• slice_derivation()
• derivation_slice()
• restrict_derivation()
• slice_derivation()

Definition of Done

Add sources as a function argument and begin the deprecation process of ... and args for the above functions

[bundfussr]

I think param() should not be changed.

I would wait until we have cleaned up the functions before implementing this issue. In particular derive_var_dthcaus(), derive_var_extreme_dt(), and derive_var_extreme_dtm() are questionable because they are very similar.

[bms63]

Converting back to discussion. I think after the documentation review we should revisit this topic. @manciniedoardo @bundfussr @ddsjoberg @zdz2101