https://download.eclipse.org/modeling/mdt/ocl/javadoc/4.0.0/org/eclipse/ocl/parser/backtracking/OCLBacktrackingKWLexerprs.IsNullable.html
OCLBacktrackingKWLexerprs.IsNullable (MDT-OCL Documentation)
mdtocldocumentation
https://download.eclipse.org/modeling/mdt/ocl/javadoc/4.0.0/org/eclipse/ocl/parser/OCLKWLexerprs.IsNullable.html
OCLKWLexerprs.IsNullable (MDT-OCL Documentation)
mdtocldocumentation
https://codeql.github.com/codeql-standard-libraries/javascript/semmle/javascript/Regexp.qll/predicate.Regexp$RegExpSubtraction$isNullable.0.html
isNullable
API documentation for CodeQL