class Dry::Schema::Macros::Maybe

@api private
Macro used to specify predicates for a value that can be ‘nil`

def call(*args, **opts, &block)

Other tags:
    Api: - private 
def call(*args, **opts, &block)
  if args.include?(:empty?)
    raise ::Dry::Schema::InvalidSchemaError, 'Using maybe with empty? predicate is invalid'
  end
  if args.include?(:nil?)
    raise ::Dry::Schema::InvalidSchemaError, 'Using maybe with nil? predicate is redundant'
  end
  value(*args, **opts, &block)
  self
end

def to_ast

Other tags:
    Api: - private 
def to_ast
  [:implication,
   [
     [:not, [:predicate, [:nil?, [[:input, Undefined]]]]],
     trace.to_rule.to_ast
   ]
  ]
end