getFeature: Generate location features
In fchen365/surf: Statistical Utility for RBP (RNA binding protein) Functions

Generate location features for each ATR event.

getFeature(
  isoPLas,
  anno_event,
  depth.exon = 100,
  depth.intron = 300,
  cores = max(1, detectCores() - 2),
  remove.duplicate = TRUE,
  verbose = FALSE
)

`isoPLas`	isoform parts list with AS events.
`anno_event`	`DataFrame`, event annotation w/o features.
`depth.exon`	`integer`, extended depth into exon, default 50 nt.
`depth.intron`	`integer`, extended depth into intron, default 300 nt.
`cores`	`integer`, number of computing cores to use.
`remove.duplicate`	`logical`, whether (default to `TRUE`) to remove identical event duplicates (by keeping one).
`verbose`	`logical`, whether (default to `TRUE`) to echo progress