class Prism::ModuleNode

def ===(other)

comparing the value of locations. Locations are checked only for presence.
Implements case-equality for the node. This is effectively == but without 
def ===(other)
  other.is_a?(ModuleNode) &&
    (locals.length == other.locals.length) &&
    locals.zip(other.locals).all? { |left, right| left === right } &&
    (module_keyword_loc.nil? == other.module_keyword_loc.nil?) &&
    (constant_path === other.constant_path) &&
    (body === other.body) &&
    (end_keyword_loc.nil? == other.end_keyword_loc.nil?) &&
    (name === other.name)
end