Return the TwasWeightsEntry for one
(study, context, trait, method) row of a TwasWeights
collection.
Usage
getTwasWeights(x, study = NULL, context = NULL, trait = NULL, method = NULL)
# S4 method for class 'TwasWeights'
getTwasWeights(x, study = NULL, context = NULL, trait = NULL, method = NULL)