The maximum length of a configuration object name.
Many filesystems (including HFS, NTFS, and ext4) have a maximum file name length of 255 characters. To ensure that no configuration objects incompatible with this limitation are created, we enforce a maximum name length of 250 characters (leaving 5 characters for the file extension).
http://en.wikipedia.org/wiki/Comparison_of_file_systems
const MAX_NAME_LENGTH = 250;