ByteRangeSize returns byteRange.Upper - byteRange.Lower.
IsBranchNotFoundErr returns true if 'err' is an error message about a branch not being found
IsCommitDeletedErr returns true if 'err' has an error message that matches ErrCommitDeleted
IsCommitFinishedErr returns true of 'err' has an error message that matches ErrCommitFinished
IsCommitNotFoundErr returns true if 'err' has an error message that matches ErrCommitNotFound
IsFileNotFoundErr returns true if 'err' is an error message about a PFS file not being found
IsRepoNotFoundErr returns true if 'err' is an error message about a repo not being found
ErrCommitDeleted represents an error where the commit has been deleted (e.g. from InspectCommit)
ErrCommitExists represents an error where the commit already exists.
ErrCommitFinished represents an error where the commit has been finished (e.g from PutFile or DeleteFile)
ErrCommitNotFound represents a commit-not-found error.
ErrFileNotFound represents a file-not-found error.
ErrNoHead represents an error encountered because a branch has no head (e.g. inspectCommit(master) when 'master' has no commits)
ErrParentCommitNotFound represents a parent-commit-not-found error.
ErrRepoExists represents a repo-exists error.
ErrRepoNotFound represents a repo-not-found error.