class Prism::ClassVariableOperatorWriteNode

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?(ClassVariableOperatorWriteNode) &&
    (name === other.name) &&
    (name_loc.nil? == other.name_loc.nil?) &&
    (binary_operator_loc.nil? == other.binary_operator_loc.nil?) &&
    (value === other.value) &&
    (binary_operator === other.binary_operator)
end