--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Append a child to this element, optionally under a provided namespace. The namespace argument is ignored if the element argument is an Element object. Otherwise, the element argument is a string, the namespace (if provided) is the namespace the element is created in.
full_name: REXML::Light::Node#<<
is_singleton: false
name: "<<"
params: (element)
visibility: public