public function drop_column(Table $table, Fluent $command)
		{
			$columns = array_map(array($this, 'wrap'), $command->columns);

			// Once we the array of column names, we need to add "drop" to the front
			// of each column, then we'll concatenate the columns using commas and
			// generate the alter statement SQL.
			$columns = implode(', ', array_map(function($column) {
				return 'DROP ' . $column;
			}, $columns));

			return 'ALTER TABLE ' . $this->wrap($table) . ' ' . $columns;
		}