`exceptions`

Exceptions for the PDB loader.

Exceptions

`PabloError`	A generic Pablo error.
`ResidueValidationError`	A newly created `ResidueDefinition` is invalid.
`PdbResidueMatchError`	A residue could not be matched to a residue definition while loading a file.
`UnknownOrAmbiguousSerialInConectError`	While parsing a PDB file, a CONECT record has an incorrect atom serial.
`MissingAtomError`	A required atom is missing from a `ResidueDefinition`.