MatrixWorkspaceValidator# This is a Python binding to the C++ class Mantid::API::MatrixWorkspaceValidator. bases: mantid.api.MatrixWorkspaceValidator class mantid.api.MatrixWorkspaceValidator# isValid((MatrixWorkspaceValidator)self, (MatrixWorkspace)value) → str :# Returns an empty string if the value is considered valid, otherwise a string defining the error is returned.