public function crop( $path_to_png, $border = '20x20' ) {

		$command = PB_CONVERT_COMMAND . ' ' . escapeshellarg( $path_to_png ) . " -trim +repage -bordercolor white -border {$border} " . escapeshellarg( $path_to_png );

		// Execute command
		$output = [];
		$return_var = 0;
		exec( $command, $output, $return_var ); // @codingStandardsIgnoreLine

		if ( ! empty( $output ) ) {
			// @codingStandardsIgnoreStart
			debug_error_log( $command );
			debug_error_log( print_r( $output, true ) );
			// @codingStandardsIgnoreEnd
		}
	}