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A constructor for simple value objects, known as provider instances. This value has a dual purpose:
  • It is a function that can be called to construct ‘struct’-like values: 
    DataInfo = provider()
d = DataInfo(x = 2, y = 3)
print(d.x + d.y) # prints 5
    Note: Some providers, defined internally, do not allow instance creation
  • It is a key to access a provider instance on a Target 
    DataInfo = provider()
def _rule_impl(ctx)
  ... ctx.attr.dep[DataInfo]
Create a new Provider using the provider function.