def set_default_presentation_context(abstract_syntax)
      raise ArgumentError, "Expected String, got #{abstract_syntax.class}" unless abstract_syntax.is_a?(String)
      id = 1
      transfer_syntaxes = [IMPLICIT_LITTLE_ENDIAN, EXPLICIT_LITTLE_ENDIAN, EXPLICIT_BIG_ENDIAN]
      item = {:transfer_syntaxes => transfer_syntaxes}
      pc = {id => item}
      @presentation_contexts = {abstract_syntax => pc}
    end
def set_default_presentation_context(abstract_syntax)
      raise ArgumentError, "Expected String, got #{abstract_syntax.class}" unless abstract_syntax.is_a?(String)
      id = 1
      transfer_syntaxes = [IMPLICIT_LITTLE_ENDIAN, EXPLICIT_LITTLE_ENDIAN, EXPLICIT_BIG_ENDIAN]
      item = {:transfer_syntaxes => transfer_syntaxes}
      pc = {id => item}
      @presentation_contexts = {abstract_syntax => pc}
    end
Creates the presentation context used for the non-file-transmission association requests..