@Override
	public boolean isValid() {
		return magic.length == 4 && !pdbName.isBlank() && guid != null;
	}
Creates an instance from explicit values.

@param pdbPath String path / filename of the pdb file
@param age age
@param guid {@link GUID}
@return new instance, never null
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pdb/PdbInfoDotNet.java