missing_dependency 
                  Missing a dependency on imported package '{0}'.
Description
#The analyzer produces this diagnostic when there's a package that has been imported in the source but is not listed as a dependency of the importing package.
Example
#
                    The following code produces this diagnostic because the package path is
                    not listed as a dependency, while there is an import statement
                    with package path in the source code of package example:
                  
                      yaml
                      
                  name: example
dependencies:
  meta: ^1.0.2
                      
                      
                      
                    Common fixes
#Add the missing package path to the dependencies field:
                      yaml
                      
                  name: example
dependencies:
  meta: ^1.0.2
  path: any