src/Psalm/Internal/Analyzer/StatementsAnalyzer.php
public function getFirstAppearance($var_id)
    {
        return isset($this->all_vars[$var_id]) ? $this->all_vars[$var_id] : null;
    }
public function getFirstAppearance($var_id)
    {
        return isset($this->all_vars[$var_id]) ? $this->all_vars[$var_id] : null;
    }
public function getFirstAppearance ( $ var_id ) { return isset ( $ this -> all_vars [ $ var_id ] ) ? $ this -> all_vars [ $ var_id ] : null ; }
The first appearance of the variable in this set of statements being evaluated

@param  string  $var_id

@return CodeLocation|null
The first appearance of the variable in this set of statements being evaluated