pkg go/types, method (*Chan) Elem() Type
pkg go/types, method (*Chan) String() string
pkg go/types, method (*Chan) Underlying() Type
pkg go/types, method (*Checker) Files([]*ast.File) error
pkg go/types, method (*Config) Check(string, *token.FileSet, []*ast.File, *Info) (*Package, error)
pkg go/types, method (*Const) Exported() bool
pkg go/types, method (*Const) Id() string
pkg go/types, method (*Const) Name() string

		case "", "1":
			if strings.Contains(src, "interface{R}.Read") {
				continue
			}
		}

		files = append(files, file)
	}

	conf := Config{Importer: importer.Default()}
	pkg, err := conf.Check("p", fset, files, nil)
	if err != nil {
		t.Fatal(err)
	}

	for _, file := range files {
		for _, group := range file.Comments {
			for _, comment := range group.List {
				s := comment.Text

            // This is just a super simple implementation for now
            Set<File> files = fileCollection.getFiles();
            ImmutableSet.Builder<FileSystemLocation> builder = ImmutableSet.builderWithExpectedSize(files.size());
            for (File file : files) {
                builder.add(new DefaultFileSystemLocation(file));
            }
            return builder.build();
        }

	// syntax and type information
	Fset         *token.FileSet // file position information; Run may add new files
	Files        []*ast.File    // the abstract syntax tree of each file
	OtherFiles   []string       // names of non-Go files of this package
	IgnoredFiles []string       // names of ignored source files in this package
	Pkg          *types.Package // type information about the package

        set.srcDir 'dir1'

        then:
        dirs.files == [testDir.file('dir1')] as Set

        when:
        set.srcDir 'dir2'

        then:
        dirs.files == [testDir.file('dir1'), testDir.file('dir2')] as Set

        when:
        set.srcDirs = []

        then:
        dirs.files.empty
    }

    void containsFilesFromEachSourceDirectory() {

	seenPkgMap map[*Package]bool

	// information collected during type-checking of a set of package files
	// (initialized by Files, valid only for the duration of check.Files;
	// maps and lists are allocated on demand)
	files         []*ast.File               // package files
	versions      map[*ast.File]string      // maps files to version strings (each file has an entry); shared with Info.FileVersions if present

func (e *NoGoError) Error() string {
	return "no buildable Go source files in " + e.Dir
}

// MultiplePackageError describes a directory containing
// multiple buildable Go source files for multiple packages.
type MultiplePackageError struct {
	Dir      string   // directory containing files
	Packages []string // package names found
	Files    []string // corresponding files: Files[i] declares package Packages[i]
}

				if isTypes2 {
					w.string(fmt.Sprintf(" /* with %s declared at %v */", t.obj.name, t.obj.Pos()))
				} else {
					// Can't print position information because
					// we don't have a token.FileSet accessible.
					w.string("/* type parameter */")
				}
			}
		}

	case *Alias:
		w.typeName(t.obj)
		if list := t.targs.list(); len(list) != 0 {
			// instantiated type
			w.typeList(list)

				if isTypes2 {
					w.string(fmt.Sprintf(" /* with %s declared at %v */", t.obj.name, t.obj.Pos()))
				} else {
					// Can't print position information because
					// we don't have a token.FileSet accessible.
					w.string("/* type parameter */")
				}
			}
		}

	case *Alias:
		w.typeName(t.obj)
		if list := t.targs.list(); len(list) != 0 {
			// instantiated type
			w.typeList(list)

		slicesContains(pass.IgnoredFiles, filename) {
		return nil
	}
	for _, f := range pass.Files {
		// TODO(adonovan): use go1.20 f.FileStart
		if pass.Fset.File(f.Pos()).Name() == filename {
			return nil
		}
	}
	return fmt.Errorf("Pass.ReadFile: %s is not among OtherFiles, IgnoredFiles, or names of Files", filename)
}

// TODO(adonovan): use go1.21 slices.Contains.