Utility/JsonParser.php
public function hasParam($path)
    {
        $this->validatePath($path);

        $value = $this->translatePathElement($path, $this->params);

        return (null === $value) ? false : true;
    }
public function hasParam($path)
    {
        $this->validatePath($path);

        $value = $this->translatePathElement($path, $this->params);

        return (null === $value) ? false : true;
    }
public function hasParam ( $ path ) { $ this -> validatePath ( $ path ) ; $ value = $ this -> translatePathElement ( $ path , $ this -> params ) ; return ( null === $ value ) ? false : true ; }
Returns json true if path exists

@param  string $path json path
@return boolean      true if path exists
Returns json true if path exists