Common Lisp LOOP License
['https://gitlab.com/embeddable-common-lisp/ecl/-/blob/develop/src/lsp/loop.lsp', 'http://git.savannah.gnu.org/cgit/gcl.git/tree/gcl/lsp/gcl_loop.lsp?h=Version_2_6_13pre', 'https://sourceforge.net/p/sbcl/sbcl/ci/master/tree/src/code/loop.lisp', 'https://github.com/cl-adams/adams/blob/master/LICENSE.md', 'https://github.com/blakemcbride/eclipse-lisp/blob/master/lisp/loop.lisp', 'https://gitlab.common-lisp.net/cmucl/cmucl/-/blob/master/src/code/loop.lisp']