class ActionController::UnfilteredParameters

# => ActionController::UnfilteredParameters: unable to convert unpermitted parameters to hash
params.to_h
params = ActionController::Parameters.new(a: “123”, b: “456”)
an operation to transform it to hash is called.
Raised when a Parameters instance is not marked as permitted and

def initialize # :nodoc:

:nodoc: 
def initialize # :nodoc:
  super("unable to convert unpermitted parameters to hash")
end