question: get the parent of this node concode_field_sep HashMap<String,TrieNode> children concode_elem_sep TrieNode parent concode_elem_sep boolean property concode_elem_sep Logger LOG concode_elem_sep TrieNode rootNode concode_field_sep String[] getChildren concode_elem_sep boolean getProperty concode_elem_sep void deleteChild concode_elem_sep void setProperty concode_elem_sep TrieNode getChild concode_elem_sep String toString concode_elem_sep void setParent concode_elem_sep void deletePath concode_elem_sep void addChild concode_elem_sep void addPath concode_elem_sep String findMaxPrefix
target: TrieNode function ( ) { return this . parent ; }