public function isMetric( $field )
    {
        if ( array_key_exists($field, $this->defaults) ){
            return ( isset($this->defaults[$field]['metric']) ) ? $this->defaults[$field]['metric'] : false;
        }
        return false;
    }
public function isMetric( $field )
    {
        if ( array_key_exists($field, $this->defaults) ){
            return ( isset($this->defaults[$field]['metric']) ) ? $this->defaults[$field]['metric'] : false;
        }
        return false;
    }
public function isMetric ( $ field ) { if ( array_key_exists ( $ field , $ this -> defaults ) ) { return ( isset ( $ this -> defaults [ $ field ] [ 'metric' ] ) ) ? $ this -> defaults [ $ field ] [ 'metric' ] : false ; } return false ; }
Check if field is metric
@param $field
@return bool
Check if field is metric