- * Construct and send a command to align structures against a reference
- * structure, based on one or more sequence alignments
- *
- * @param _alignment
- * an array of alignments to process
- * @param _refStructure
- * an array of corresponding reference structures (index into pdb
- * file array); if a negative value is passed, the first PDB file
- * mapped to an alignment sequence is used as the reference for
- * superposition
- * @param _hiddenCols
- * an array of corresponding hidden columns for each alignment