parameters: (self, t, i, child)
docstring: Set ith child (0..n-1) to t; t must be non-null and non-nil node
docstring_summary: Set ith child (0..n-1) to t; t must be non-null and non-nil node
docstring_tokens: Set ith child ( 0 .. n - 1 ) to t ; t must be non - null and non - nil node
function: def setChild(self, t, i, child):
          """Set ith child (0..n-1) to t; t must be non-null and non-nil node"""
  
          raise NotImplementedError
function_tokens: def setChild ( self , t , i , child ) : raise NotImplementedError