class Steep::Errors::BlockTypeMismatch

def initialize(node:, expected:, actual:, result:)

def initialize(node:, expected:, actual:, result:)
  super(node: node)
  @expected = expected
  @actual = actual
  @result = result
end

def to_s

def to_s
  "#{location_to_str}: BlockTypeMismatch: expected=#{expected}, actual=#{actual}"
end